The Hellfire Caves are a network of man-made chalk and flint caverns which extend 260m underground. They are situated above the village of West Wycombe, at the southern edge of the Chiltern Hills near High Wycombe in Buckinghamshire, Southeast England. They were excavated between 1748 and 1752 for Francis Dashwood, 11th Baron le Despencer, founder of the Society of Dilettanti and co-founder of the Hellfire Club, whose meetings were held in the caves.