Was this the first ever immersive experience in the UK? This surreal 18th-century labyrinth of caves with a subterranean ‘River Styx’ is only an hour from London
The debaucherous meeting place of a secret society, an unconventional chalk mine, a paranormal hotspot, and a unique gesture of one-upmanship from an 18th-century eccentric, the Hellfire Caves are a histo...