The Hellfire Caves, also known as the West Wycombe Caves, are a network of man-made chalk and flint caverns located in Buckinghamshire, England. These caves were excavated between 1748 and 1752 for Sir Francis Dashwood, who was part of the notorious Hellfire Club. The caves extend 260m underground and feature various chambers connected by narrow tunnels. You can explore the eerie passageways, including the Banqueting Hall and the Inner Temple, where the club's scandalous meetings took place.