Speedwell Cavern

Peak District

Just over half a mile west of Castleton at the mouth of Winnats Pass, this claustrophobe's nightmare is reached by descending 106 steps for an eerie boat ride through flooded tunnels, emerging by a huge subterranean lake called the Bottomless Pit. New chambers are discovered here all the time by potholing expeditions.

Lonely Planet's must-see attractions

Nearby Peak District attractions

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2. Peak Cavern

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3. Blue John Cavern

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4. Peveril Castle

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Topping the ridge to the south of Castleton, a 350m walk from the town centre, this evocative castle has been so ravaged by the centuries that it almost…

5. Castleton Museum

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6. Cathedral of the Peak


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7. Derwent Dam Museum

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8. Eyam Museum

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