The Most Beautiful Castles, Palaces and Fortresses in Wales
5 places · updated 14 October 2026
In short: By our ranking, the most beautiful castles, palaces and fortresses in Wales are Conwy Town Walls, Caernarfon Castle and Conwy Castle. The list covers 5 castles, palaces and fortresses. Last updated 14 October 2026.
Wales has more castles for its size than almost anywhere in Europe, and the reason is centuries of conquest and resistance. Norman lords pushed into the Welsh borderlands after 1066, native Welsh princes built strongholds of their own in the mountains, and in the late thirteenth century Edward I of England ringed the north with fortresses designed by his master mason, James of St George, to hold the land he had conquered. Many of these were built at the peak of medieval military architecture, and they still stand over harbours, rivers and walled towns.
Caernarfon Castle, on the Menai Strait, has polygonal towers and bands of coloured stone that recall the walls of Constantinople, a deliberate statement of imperial power. Conwy Castle, with its eight great round towers, stands at the head of a town still enclosed by its medieval walls, which run for well over a kilometre with more than twenty towers and three gateways.
Harlech Castle rises on a rocky crag above the dunes of Cardigan Bay; its long siege during the Wars of the Roses is remembered in the song Men of Harlech. In the south, Cardiff Castle tells a longer story in one place, from a Roman fort and a Norman keep on its mound to the lavish Victorian Gothic interiors created by William Burges for the Marquess of Bute.
In this list
| # | Place | Type | UNESCO |
|---|---|---|---|
| 1 | Conwy Town Walls | City walls | ✓ |
| 2 | Caernarfon Castle | Castle | ✓ |
| 3 | Conwy Castle | Castle | ✓ |
| 4 | Harlech Castle | Castle | ✓ |
| 5 | Cardiff Castle | Castle |
01 Conwy Town Walls
United Kingdom53.281° N 3.831° W
- UNESCO World Heritage
David Dixon · CC BY-SA 2.0 Many details reward a close look. The towers are open at the back, spanned originally by removable timber bridges, so that any stretch of wall could be cut off if an enemy got onto it. The Upper Gate keeps a rare surviving barbican. Along the southern wall, a unique row of twelve medieval latrines, built for the royal staff, projects from the parapet — a rare glimpse of everyday life in the Edwardian town.
Did you know? Medieval records say the walls were 'daubed', which suggests they may originally have been whitewashed rather than left as bare stone.
02 Caernarfon Castle
United Kingdom53.139° N 4.277° W
- UNESCO World Heritage
Tilman2007 · CC BY-SA 4.0 Work on the stone castle began in 1283, right after Edward's conquest of Gwynedd, on the site of a Norman motte-and-bailey from the late eleventh century. The master mason was probably James of Saint George, the engineer behind Edward's Welsh castle programme, although some historians credit Walter of Hereford, who took charge of the second phase.
Did you know? The tale that Edward I promised the Welsh a prince who spoke no English, then showed them his baby son, can only be traced to the 16th century.
03 Conwy Castle
United Kingdom53.280° N 3.826° W
- UNESCO World Heritage
Image by stevenm-s from Pixabay The castle was built for Edward I of England during his conquest of Wales. He took the site in 1283, moved the Cistercian abbey that stood there further up the valley, and in its place founded an English garrison town. Work began within days. Under the direction of Master James of St George, the king's master builder from Savoy, the castle went up in just four years, from 1283 to 1287, with the town walls built alongside.
Did you know? Edward I was besieged at Conwy by Welsh rebels in the winter of 1294–95 and was supplied only by sea.
04 Harlech Castle
United Kingdom52.860° N 4.109° W
- UNESCO World Heritage
Image by diego_torres from Pixabay Edward I ordered it in 1283, in the wake of his campaign against the last native princes of Wales, and it was largely finished by the end of 1289 at a cost of about £8,190. The work was directed by Master James of St George, the military engineer from Savoy who also built the king's castles at Conwy, Caernarfon and Beaumaris; the round-headed doorways and other details at Harlech echo buildings in his homeland.
Did you know? A Lancastrian garrison held Harlech from 1461 to 1468, a siege traditionally credited with inspiring the song "Men of Harlech".
05 Cardiff Castle
United Kingdom · 0.9 km from Cardiff51.482° N 3.181° W
User: (WT-shared) Cardiff at wts wikivoyage · Public domain After the Normans pushed into South Wales in the late 11th century they raised a tall earth motte inside the old Roman walls, and in the following century crowned it with the many-sided stone shell keep that still stands on its mound, ringed by a moat.
Did you know? The Arab Room is known for its gilded honeycomb ceiling.
How this list is ranked
Places are chosen for how they look, not for how famous they are: each one has its own description and a photograph credited to its author. The order is a single world ranking that weighs the beauty of the place in curated photography together with how widely it is documented — the number of language editions of its encyclopedia article and how often that article is read in a year. The list is rebuilt as places are added, so the order and the counts on this page are always current.
Questions people ask
- What are the most beautiful castles, palaces and fortresses in Wales?
- On our list, Conwy Town Walls ranks first, followed by Caernarfon Castle and Conwy Castle.
- What is the oldest castle in Wales?
- Chepstow Castle, begun in 1067 by William FitzOsbern above the River Wye, is usually described as the oldest surviving post-Roman stone fortification in Britain.
- Who built the castles of North Wales?
- Edward I of England built a chain of castles after conquering Gwynedd in the 1280s, including Caernarfon, Conwy, Harlech and Beaumaris. They were designed by his master mason, James of St George.
- Why are there so many castles in Wales?
- For centuries Wales was a contested frontier: Norman Marcher lords, native Welsh princes and English kings all built strongholds to take or hold territory. The result is one of the densest concentrations of castles in Europe.
- How many castles, palaces and fortresses are on this list in Wales?
- The list covers 5 castles, palaces and fortresses.