Eastwater Cavern

Eastwater Cavern, also called Eastwater Swallet, is a limestone cave close to the village of Priddy in the Mendip Hills of Somerset, England. It is a demanding system for experienced cavers rather than a show cave open to casual visitors.

What is Eastwater Cavern?

The cave drops steeply through a sequence of passages and shafts. The Mendip Cave Registry lists it at roughly 2.8 km long and about 160 m deep, though other published surveys quote a somewhat greater length. From the entrance boulder choke, the route leads into the Upper Series and on to Primrose Pot, and the lowest point is reached by following the underground stream.

How was it discovered?

Digging began in April 1902 under Herbert E. Balch, with paid labourers working alongside volunteers from the Wells Natural History Society. Progress was slow at first, but by February 1903 Balch and Willcox had found a large stretch of passage and followed the streamway to the bottom. Later explorers kept extending the system: the Wessex Cave Club dug Dolphin Pot in 1940, Primrose Pot followed in 1950, and the West End Series, found in 1983, was the most recent major discovery.

What can you expect, and who is it for?

Eastwater is a classic sporting cave: tight sections, vertical drops and a flowing stream. You need a helmet with a light, suitable clothing, caving experience and rope or ladder skills. It is not a place to go alone without knowing the system. Beginners should book a licensed guide or join a caving club trip.

How do you get there and is access allowed?

The cave sits beside Eastwater Farm, near Priddy, at roughly 51.253 N, 2.662 W. Before going underground, ask permission at the farm and pay a small goodwill fee, which sources list as a few pounds per person. Check the Mendip Cave Registry or local caving clubs for current rules before you travel, as access arrangements can change.

When should you go?

There is no season, but after heavy rain the stream floods and the passages become harder and potentially dangerous. Plan trips for dry spells, check the forecast and always leave a call-out time with someone on the surface.

Frequently asked questions

Is Eastwater Cavern a tourist attraction?

Not in the usual sense. It is a sporting cave for experienced cavers or those with a guide.

Do you need permission to enter?

Yes. Visitors call at Eastwater Farm for permission and pay a small goodwill fee.

How deep is Eastwater Cavern?

The Mendip Cave Registry gives about 160 m depth and about 2.8 km of passage.

Where is it?

Near Priddy in the Mendip Hills, Somerset, in south-west England.