The Hell Fire caves at West Wycombe were excavated by Sir Francis Dashwood in 1750's at the site of an ancient quarry.
Throughout the 1700s and 1800s the caves, which are a quarter of a mile long, were a favourite party spot for some of Britain's most senior aristocrats and statesmen.
Tales of their revelling in the caves are legendary and even orgies were supposed to have occurred deep down within the dark network of tunnels.
American president Benjamin Franklin also visited the site which is still owned by the Dashwood family of West Wycombe.
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