Alum Pot
Alum Pot is a pothole with a large open shaft at a surface elevation of 343 metres (1, 125 ft) on the eastern flanks of Simon Fell, North Yorkshire, England. It connects with nearby Long Churn Cave and Diccan Pot. The pot is accessed via a 1-km private track on payment of a small fee from Selside Farm in the hamlet of Selside in Ribblesdale. Alum Pot has variously been known as Allan, Alan, Allen, Hellen and Hell'n.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).