A route through the underground chambers proceeds, from the Entrance Hall, to the Steward's Chamber and Whitehead's Cave, through Lord Sandwich's Circle (named after John Montagu, 4th Earl of Sandwich), Franklin's Cave (named after Benjamin Franklin, a friend of Dashwood who visited West Wycombe), the Banqueting Hall (allegedly the largest man-made chalk cavern in the world), the Triangle, to the Miner's Cave; and finally, across a subterranean river named the Styx, lies the final cave, the Inner Temple, where the meetings of the Hellfire Club were held, and which is said to lie 300 feet directly beneath the church on top of West Wycombe hill.