Thor's Well

Thor's Well is a round hole in the basalt shelf at the foot of Cape Perpetua on the central Oregon coast, and at high tide it seems to swallow the Pacific. Waves rush in beneath the rock, the hole fills from below and bursts upward in a fountain of spray, and then the water pours back down the opening as if draining into the earth — the reason it is sometimes called the drainpipe of the Pacific.

The well is generally explained as a former sea cave. Over thousands of years waves pounding the volcanic shoreline hollowed out a cavern, until its roof gave way and left a bowl-shaped opening a short distance from the water's edge, connected to the sea underneath. Its depth is usually estimated at about 6 m (20 ft). The show depends on the tide, the height and direction of the swell and the wind, and is most dramatic in the hours around high tide. Two neighbouring features work in a similar way: Spouting Horn, about 100 m to the south, another tide-driven saltwater fountain, and Devil's Churn, a long narrow cleft that fills with every wave and sometimes explodes where incoming and outgoing surges meet.

Cape Perpetua itself rises more than 800 ft (about 245 m) above the sea, and on a clear day the view from its crest takes in some 70 miles of coastline. Captain James Cook named the headland on 7 March 1778, the feast day of Saint Perpetua. It became part of the Siuslaw National Forest in 1908; in 1933 a Civilian Conservation Corps camp built trails, a campground and the stone West Shelter lookout on the summit, and in the 1960s the Cape Perpetua Scenic Area was created to protect some 2,700 acres of old-growth forest. Shell middens left by Native American communities lie along the shore path, and the tidepools below form a protected marine garden.

Getting there

Thor's Well lies about 2 miles (3 km) south of Yachats on US Route 101, and about 11 miles south of Waldport. The paved Captain Cook Trail leads from the Cape Perpetua visitor center down to the shore, where the well is visible from the edge of Cook's Chasm. The nearest larger city is Corvallis, about 75 km away in a straight line; the nearest airport is Southwest Oregon Regional Airport (OTH) in North Bend, about 96 km away.