The Most Beautiful Show Caves in the World

36 places in 20 countries · updated 14 October 2026

1. 01 Padirac Cave

   Gouffre de Padirac

   France · 36.7 km from Brive-la-Gaillarde44.858° N 1.750° E

   

   The Gouffre de Padirac opens in the Jurassic limestone of the Causse de Gramat, in the Lot department of southwestern France, as a nearly circular shaft about 35 metres across and 103 metres deep. It was once a closed underground chamber; at some unknown moment its roof collapsed, leaving an open well that local people long associated with the devil. At the bottom flows an underground river that has been carving its way through the plateau for one to two million years, part of a karst network of which more than 58 km had been mapped by 2025.

   Did you know? In 1948 cave diver Guy de Lavaur explored the Montvalent spring in a wetsuit his wife made by gluing foam rubber onto his old-fashioned bathing costume.

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2. 02 Škocjan Caves

   Škocjanske jame

   Slovenia · 15.3 km from Trieste45.665° N 13.995° E

   • UNESCO World Heritage
   • UNESCO natural beauty

   

   At Škocjan the Reka River, after some 55 km on the surface and a final four-kilometre gorge, runs up against a limestone wall and disappears underground. What it has carved beneath the Karst plateau is not a pretty grotto but one of the largest underground canyons known: the stretch called Šumeča jama, the Murmuring Cave, is about 3.5 km long, 10 to 60 metres wide and in places well over 100 metres high. Where the gorge widens it forms chambers, and the largest, Martel's Chamber, is 308 metres long, up to 123 metres wide and 146 metres high at the top of its vault, with a volume of about 2.2 million cubic metres. The river then flows on for 34 km out of sight and resurfaces at the springs of the Timavo near the Adriatic coast. The caves were inscribed on the UNESCO World Heritage list in 1986.

   Did you know? The underground path crosses the gorge on Cerkvenik Bridge, which hangs about 50 metres above the roaring Reka.

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3. 03 Cueva de los Verdes

   Spain · 23.3 km from Arrecife29.161° N 13.439° W

   

   The Cueva de los Verdes is a lava tube in the north of Lanzarote, a tunnel left behind when rivers of molten rock from the La Corona volcano flowed towards the sea. As the surface of the flow cooled and hardened into a crust, the lava beneath kept moving and eventually drained away, leaving a hollow passage. The whole system runs for more than seven kilometres from the volcano to the coast and continues under the sea as the Túnel de la Atlántida; in about twenty places the roof has collapsed, forming the openings the islanders call jameos.

   Did you know? The tube continues for about 1.5 kilometres beneath the sea, because it formed when sea level was some 80 metres lower than today.

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4. 04 Fingal's Cave

   United Kingdom56.431° N 6.341° W

   

   The columns inside this cave on the uninhabited island of Staffa were poured, geologically speaking, at the same moment as the more famous ones across the water in Ireland. Around 60 million years ago, a single vast lava flow cooled slowly enough that it cracked into regular hexagonal columns as it contracted — the same process, the same flow, on both sides of what's now open sea. The Giant's Causeway and this cave are, quite literally, two exposed cross-sections of one geological event.

   Did you know? In Scottish Gaelic the cave is called An Uaimh Bhinn, the melodious cave, a name earned by the sound of the sea inside it.

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5. 05 Eisriesenwelt

   Austria · 36 km from Salzburg47.503° N 13.190° E

   

   In 1879, a Salzburg naturalist named Anton von Posselt-Czorich became the first documented person to enter this cave above the Salzach valley. He got about 200 metres in, by torchlight, before turning back — not because the passage stopped, but because what lay ahead unsettled him enough that he wrote of fearing he'd found an entrance to the underworld. It's easy to see why: the cave breathes. Cold, dense winter air sinks into the mountain and pools in its vast chambers, and when warmer, moisture-laden air meets it in spring and summer, that moisture freezes on contact — not from an ancient glacier dragged inside, but built up season after season, meltwater by meltwater, for roughly a thousand years in the oldest layers.

   Did you know? Explorer Alexander von Mörk was the first to pass the Sturmsee, a then-flooded passage, and found beyond it the vast hall later named after him.

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6. 06 Paradise Cave (Thiên Đường)

   Vietnam17.520° N 106.223° E

   

   Paradise Cave — Động Thiên Đường in Vietnamese — is a limestone cave in the hills of Phong Nha–Kẻ Bàng National Park, a UNESCO World Heritage Site in central Vietnam. It was found by a local man in 2005, and British cavers of the British Cave Research Association began exploring it the same year. They went on to survey a total of about 31 km of passages, more than Phong Nha Cave, until then considered the longest in the park, and gave it the name Paradise.

   Did you know? With roughly 31 km of surveyed passages, Paradise Cave is often described as the longest dry cave in Asia.

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7. 07 Puerto Princesa Subterranean River National Park

   Philippines10.167° N 118.917° E

   • UNESCO World Heritage
   • UNESCO natural beauty

   

   The Puerto Princesa Subterranean River National Park, on the west coast of Palawan, protects a river that disappears into a mountain and reaches the sea through a cave. The Cabayugan River runs for about 8.2 km underground beneath the limestone of the Saint Paul Mountain Range before flowing straight out into the South China Sea, through a cave system at least 32 km long. Until a longer underground river was found in Mexico in 2007, it was thought to be the longest in the world.

   Did you know? In 2011 Italian cave explorers found the fossil of an extinct sea cow, estimated at about 20 million years old, embedded in the cave wall above the water.

   More about Puerto Princesa Subterranean River National Park →

8. 08 Cueva de Nerja

   Spain36.762° N 3.845° W

   

   The Cave of Nerja is one of the great show caves of Europe: a system of chambers almost 5 km long in the marble hills above the Costa del Sol, formed as water dissolved the rock over some five million years. Its Hall of the Cataclysm, more than 100 metres long, is dominated by a single enormous column about 32 metres high and 13 by 7 metres at its base, often described as the largest in the world. Another chamber forms a natural amphitheatre where concerts and dance festivals are staged, with about 100 permanent seats.

   Did you know? In a corner of the Hall of the Cataclysm, fluted columns ring with different notes when struck, and some seem to have been shaped by prehistoric people to tune them.

   More about Cueva de Nerja →

9. 09 Neptune's Grotto

   Grotte di Nettuno

   Italy · 39.2 km from Sassari40.565° N 8.160° E

   

   Neptune's Grotto opens at the foot of Capo Caccia, a sheer headland on the coast near Alghero. Its mouth sits barely a metre above the Mediterranean under cliffs about 110 metres high, and that position decides everything about a visit: the cave can only be entered when the sea is calm. Local fishermen are said to have found it in the 18th century, and it has drawn travellers ever since — King Charles Albert of Sardinia came three times, in 1829, 1841 and 1843, and marble plaques inside record his visits. The Victorian travel writer John Warren Tyndale, by contrast, spent a long stay in Alghero and never managed to get in.

   Did you know? The cave is named after Neptune, the Roman god of the sea, and is known in the Catalan spoken in Alghero as Cova de Neptú.

   More about Neptune's Grotto →

10. 10 Caves of Gargas

    Grottes de Gargas

    France43.056° N 0.536° E

    

    The Caves of Gargas hold one of the most haunting sights in Ice Age art: walls crowded with the outlines of human hands. More than two hundred of them have been counted, stencilled in red ochre or black manganese by blowing pigment around a palm pressed flat against the rock. They belong to men and women and to children, even infants, and in nearly half of them the fingers stop short, as though missing their outer joints, while the thumb is always whole. Few painted caves anywhere hold so many.

    Did you know? Gargas holds more than 200 stencilled hands, one of the largest such groups in any Ice Age cave.

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11. 11 Frasassi Caves

    Grotte di Frasassi

    Italy43.401° N 12.963° E

    

    The Frasassi Caves lie inside the limestone of the Apennines near Genga, in the Marche. The first entrance was found by a farmer in 1948, and cavers from Jesi and Fabriano pushed further in during the 1950s and 1960s, but the discovery that made the name came on 25 September 1971, when a group of speleologists from Ancona led by Giancarlo Cappanera broke into the Grotta Grande del Vento, the Great Cave of the Wind. Its passages run for some 13 km, and the show cave opened to the public in 1974.

    Did you know? The caves were not cut by ordinary rainwater: they formed when hydrogen sulfide-rich groundwater met oxygenated water and produced sulfuric acid that eats limestone, a process still active today.

    More about Frasassi Caves →

12. 12 Blue Grotto, Biševo

    Modra špilja

    Croatia42.980° N 16.021° E

    

    On the east side of Biševo, a small island off Vis in the outer Dalmatian archipelago, a sea cave lights up blue for about an hour around midday. The effect depends on a second, submerged opening on the south side of the cave: sunlight enters underwater, bounces off the pale floor and fills the chamber with turquoise light, while anything in the water — an oar, a hand, a stone bar crossing between the walls just below the surface — seems to glow silver. The best time is usually between 11 a.m. and noon, and the sea has to be calm. It is one of the best-known natural sights on the Croatian Adriatic and the counterpart of the Blue Grotto on Capri, which works the same way.

    Did you know? Baron Eugen von Ransonnet-Villez, on whose suggestion the boat entrance was cut, is regarded as the first known underwater artist.

    More about Blue Grotto, Biševo →

13. 13 Devetashka cave

    Деветашка пещера

    Bulgaria · 17.2 km from Lovech43.233° N 24.887° E

    

    Devetashka Cave is one of the largest caves in Bulgaria, and its entrance hall is among the most striking cave spaces in the Balkans. It opens on the east bank of the Osam River near the village of Devetaki, northeast of Lovech, with a mouth about 35 metres wide and 30 metres high. Some 40 metres in, the passage widens into a single hall of about 2,400 square metres, with a ceiling 60 metres high and in places up to 100 metres. Large holes in the roof let shafts of daylight fall onto the floor, so the main chamber feels half cave, half open valley.

    Did you know? Late Pleistocene layers in the cave yielded bones of 136 bird species, over a third of Bulgaria's modern birdlife, making it the country's richest fossil bird site.

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14. 14 Cave of Swallows

    Sótano de las Golondrinas

    Mexico21.600° N 99.099° W

    

    Despite the name, no swallows live in the Cave of Swallows. The birds that made it famous are white-collared swifts and green parakeets, thousands of them, nesting on ledges inside a single limestone shaft that drops roughly 370 meters — deep enough, cavers point out, to swallow most skyscrapers whole with room left above.

    Did you know? A person falling from the mouth without a parachute would take almost ten seconds to reach the floor.

    More about Cave of Swallows →

15. 15 Reed Flute Cave

    People's Republic of China · 2.5 km from Guilin25.304° N 110.276° E

    

    Reed Flute Cave has drawn visitors for far longer than "tourism" existed as a concept. Scholars and travelers left more than 70 ink inscriptions on its walls starting in the Tang dynasty, praising the cave in verse, with more layered on through the Song, Yuan, and Ming dynasties — turning the walls into a legible, dated record of well over a thousand years of people reacting to the same rock formations visitors react to today.

    Did you know? The oldest of the cave's ink inscriptions is dated 792, and about 77 of them survive, many still legible after more than a thousand years.

    More about Reed Flute Cave →

16. 16 Les Combarelles

    Grotte des Combarelles I

    France44.944° N 1.042° E

    • UNESCO World Heritage

    

    Les Combarelles is not a cave of great halls and painted ceilings. It is a narrow, winding passage, on average about a metre wide, cut through the limestone by an underground stream, and its walls carry one of the major collections of engraved Ice Age images in Europe: more than 600 figures scratched and incised into the rock by Magdalenian hunters. Traces of pigment show that many were once coloured; the damp air of the passage has long since washed the paint away, leaving only the lines.

    More about Les Combarelles →

17. 17 Coves del Drach

    Cuevas del Drach

    Spain39.536° N 3.331° E

    

    The Caves of Drach, the "Dragon Caves", are a chain of four connected caverns on the east coast of Mallorca, a world of white and amber stalactites that ends at one of the largest underground lakes known. Lake Martel stretches about 115 metres in length and 30 metres in width, its still water doubling every formation hanging above it. The caves run for some 2.4 km in total and descend about 25 metres; the visitor route covers around half of that length.

    Did you know? In 1904 the Romanian biologist Emil Racoviță found an unknown blind cave isopod here, Typhlocirolana moraguesi, a discovery that set him on the path to founding biospeleology.

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18. 18 Dobšinská Ice Cave

    Dobšinská ľadová jaskyňa

    Slovakia48.868° N 20.304° E

    • UNESCO World Heritage

    

    Dobšinská Ice Cave, in the Slovak Paradise National Park, is one of the largest ice caves in the world and has been part of the UNESCO World Heritage site Caves of Aggtelek Karst and Slovak Karst since 2000. Its entrance, long known to shepherds as the "Cold Hole", sits at about 970 metres on the northern slope of the Duča hill, some 130 metres above the Hnilec River, and is remarkably low for a cave of its kind.

    Did you know? The floor ice is built of thin layers, each only about 3–5 millimetres thick, stacked up to roughly 25 metres deep.

    More about Dobšinská Ice Cave →

19. 19 Cango Caves

    South Africa · 20.9 km from Oudtshoorn33.393° S 22.215° E

    

    The Cango Caves open into the foothills of the Swartberg range in South Africa's Little Karoo, a sequence of underground halls hung with stalactites, columns and flowstone formed in ancient Precambrian limestone. The system runs for more than 4 km, of which about a quarter is accessible to visitors, and it has long been one of the best known show caves in the country.

    Did you know? According to legend, guide Johnny van Wassenaer calculated that his 29-hour underground walk in 1898 had taken him 275 metres below the surface.

    More about Cango Caves →

20. 20 Castellana Caves

    Grotte di Castellana

    Italy · 35.2 km from Bari40.876° N 17.149° E

    

    The Castellana Caves exist on record because of a job that had nothing to do with finding them. In January 1938, the Provincial Tourist Board of Bari brought in Franco Anelli, a speleologist from the Italian Institute of Speleology, simply to assess some already-known local caves for their tourism potential. Instead, on January 23, Anelli found himself looking down into the Grave — a sinkhole that turned out to be the entrance to something far bigger.

    Did you know? The Grave, the entrance chasm, is a vertical drop of about 60 metres and roughly 100 metres long by 50 metres wide.

    More about Castellana Caves →

21. 21 Font-de-Gaume cave

    Grotte de Font-de-Gaume

    France44.935° N 1.029° E

    • UNESCO World Heritage

    

    Font-de-Gaume holds some of the finest polychrome paintings of the Ice Age, often ranked second only to Lascaux. A narrow corridor runs deep into a limestone hillside above the little Beune valley, just outside Les Eyzies, and its walls carry more than two hundred figures painted and engraved by Magdalenian hunters around 17,000 years ago. Bison dominate, more than eighty of them, rendered in red, brown and black with engraved contours that give their humped bodies weight and roundness; around them move horses, mammoths, reindeer, ibex and even a woolly rhinoceros. Among the best-loved images is a tender scene of a male reindeer licking the forehead of a female.

    Did you know? Schoolmaster Denis Peyrony identified the paintings on 12 September 1901, days after visiting Les Combarelles with Henri Breuil.

    More about Font-de-Gaume cave →

22. 22 Kungur Ice Cave

    Russia · 3.2 km from Kungur57.440° N 57.007° E

    

    Kungur Ice Cave lies under the Ice Mountain, a gypsum ridge on the right bank of the Sylva River at the village of Filippovka on the edge of Kungur, in Russia's Perm Krai. It is one of the largest karst caves in European Russia and one of the longest gypsum caves in the world: surveys as of 2021 put its length at about 8.2 km, of which around 2 km were equipped for visitors. Water dissolving the gypsum and anhydrite over thousands of years has produced some 48 grottoes, around seventy underground lakes and more than a hundred "organ pipes", vertical shafts that climb almost to the surface. In the section nearest the entrance, cold winter air is trapped, so the floor stays iced and the ceilings bristle with ice crystals all year; deeper in, the temperature hovers just above or below freezing and the air is saturated with moisture.

    Did you know? In a 1736 essay on the mammoth, Vasily Tatishchev explained that the giant beast locals said had dug the cave was in fact the extinct mammoth.

    More about Kungur Ice Cave →

23. 23 Ochtinská Aragonite Cave

    Ochtinská aragonitová jaskyňa

    Slovakia48.665° N 20.309° E

    • UNESCO World Heritage

    

    Inside a low hill in southern Slovakia, white needles and branching clusters of aragonite spread across the ceilings and walls like frost, so dense in places that they recall a starry sky. Ochtinská Aragonite Cave is only about 300 metres long, but it is one of very few caves in the world whose decoration is made almost entirely of aragonite rather than ordinary calcite dripstone, and it was opened to the public in 1972 as one of only a handful of accessible aragonite caves anywhere.

    Did you know? The cave's main generation of aragonite is still growing, which is why its needles and bushes stay white and clean instead of dulling with age.

    More about Ochtinská Aragonite Cave →

24. 24 Caves of Han-sur-Lesse

    Grotten van Han

    Belgium50.125° N 5.189° E

    

    The Caves of Han are the work of a single river. Near the village of Han-sur-Lesse in the Belgian Famenne, the meandering Lesse suddenly disappears into a swallow hole, the Gouffre de Belvaux, and travels under a limestone hill for about a kilometre as the crow flies before reappearing on the other side. Depending on how much water it carries, the journey takes the river anything from two to twenty-eight hours. In dissolving its way through the Devonian limestone it has left behind more than 14 km of known galleries, the longest cave system in Belgium.

    Did you know? Since 1963 divers have been excavating the riverbed at the Trou de Han, where the Lesse leaves the cave, recovering thousands of ancient objects.

    More about Caves of Han-sur-Lesse →

25. 25 Grotta Gigante

    Italy · 6.7 km from Trieste45.709° N 13.764° E

    

    Grotta Gigante is a single colossal chamber hidden beneath the limestone plateau behind Trieste: a hall so tall that a church tower would fit inside with room to spare. A laser survey carried out in 2011 measured the Great Cavern at about 98.5 metres high, 167.6 metres long and 76.3 metres wide, a volume of some 365,000 cubic metres, and in 1995 it entered the Guinness Book of Records as the largest show cave in the world, a title it held until a larger chamber in France opened to visitors in 2010.

    Did you know? The Colonna Ruggero, the cave's tallest column at 12 metres, is thought to have taken around 200,000 years to grow.

    More about Grotta Gigante →

26. 26 Pech Merle cave

    Grotte du Pech Merle

    France44.508° N 1.644° E

    

    Pech Merle is one of the very few great painted caves of the Ice Age in France that can still be entered, and the art inside is startlingly direct: a black frieze of mammoths and bison, two spotted horses set back to back, stencilled hands, and the footprints of a teenager preserved in the floor of a dried-out pool. The cave opens into a hill above the valleys of the Sagne and the Célé, near the village of Cabrerets in the Quercy; "pech" means hill in Occitan.

    Did you know? A 2011 ancient-DNA study found the gene for leopard spotting in Ice Age horses, suggesting the spotted horses were drawn from life, though later work disputed this.

    More about Pech Merle cave →

27. 27 Melissani Cave

    Λιμνοσπήλαιο Μελισσάνης

    Greece38.257° N 20.624° E

    

    The lake inside Melissani sits under a hole that wasn't always there. For most of its existence the cavern was fully enclosed, until the 1953 earthquake that devastated much of Kefalonia collapsed part of the ceiling and let daylight pour straight down onto the water, creating the shifting blue-and-turquoise light that defines the place today. Before that, the underground lake existed in the dark and wasn't even found by modern explorers until speleologist Giannis Petrohilos located it in 1951.

    Did you know? In 1963 Austrian geologists poured about 160 kilograms of dye into sinkholes near Argostoli; two weeks later it surfaced in Melissani on the other side of the island.

    More about Melissani Cave →

28. 28 Postojna Cave

    Postojnska jama

    Slovenia · 38.4 km from Ljubljana45.783° N 14.204° E

    

    Long before anyone lit a torch in Postojna's deeper chambers, the cave already had a reputation. In 1689 the Slovenian polymath Johann Weikhard von Valvasor recorded local accounts of pale, snake-like creatures that occasionally surfaced in floodwater near the entrance — animals with four small legs, a long tail, and skin the colour of a corpse. People took them for baby dragons. They were, in fact, a blind aquatic salamander now known as the olm (Proteus anguinus), a species that lives its entire life in permanent darkness, can go without food for years by slowing its metabolism almost to a stop, and is thought to live for a century or more. It took until 1768 for the animal to get a scientific name, and years longer to confirm it actually lived in the cave rather than washing in from somewhere else.

    Did you know? In 1831 the first true cave beetle known to science, the slender-necked Leptodirus, was found here, overturning the belief that caves held no life.

    More about Postojna Cave →

29. 29 Cave of El Soplao

    Cueva de El Soplao

    Spain43.296° N 4.410° W

    

    El Soplao, in the hills of western Cantabria, is a cave of ornament rather than size: its galleries are crowded with helictites, slender eccentric formations that twist sideways and upward in apparent defiance of gravity, together with translucent curtains of calcite, giant stalagmites and fields of cave pearls. It is widely regarded as one of the richest caves in Spain for the variety and quality of its formations.

    Did you know? El Soplao is the first place where stromatolites made of manganese oxides were found forming inside a cave, and they may help explain Precambrian stromatolites.

    More about Cave of El Soplao →

30. 30 Crystal Cave

    Bermuda · 7.5 km from Hamilton32.342° N 64.728° W

    

    Floating walkways carry visitors across an underground lake so clear that formations lying more than 50 feet below the surface seem to sit just beneath it, while the roof above bristles with white stalactites and fine soda straws. Crystal Cave, in Hamilton Parish on the main island of Bermuda, close to Castle Harbour, is about 500 metres long and around 62 metres deep, and its lowest 19 to 20 metres lie under water. The cave formed when sea level was lower than today; as the ocean rose, it drowned many of the stalactites and stalagmites that had grown in the air, which is why so many of them now stand in the pool.

    Did you know? Bermuda-born Michael Frith, co-creator of the 1983 puppet series Fraggle Rock, has said the Crystal Caves inspired the Fraggles' underground world.

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