Ingleborough Mountain, one of the famous Three Peaks of the Yorkshire Dales National Park, is renowned for its caves and potholes. The area contains a labyrinth of underground passages and watercourses hollowed out of the limestone rock over thousands of years. The glaciers of the Ice Ages advanced over the area and have left behind a unique and picturesque landscape, but it is on the south side of Ingleborough, near Clapham village, where there are the most famous caves of the British Isles. High on the mountain Fell Beck drops into Gaping Gill pothole with Britain’s highest waterfall into the largest underground chamber in the British Isles. Fell Beck then makes its way through large underground passages to finally emerge lower down the mountain at Ingleborough Cave.