Langcliffe Pot is a cave system on the slopes of Great Whernside in Upper Wharfedale, about SSE of Kettlewell in North Yorkshire. It is part of the Black Keld Site of Special Scientific Interest where the underground drainage system which feeds the stream resurgence at Black Keld is one of the largest and deepest in Britain, although only a small proportion of its cave passages are accessible at present. Mossdale Caverns is also part of the Black Keld SSSI. Although a considerable length of passage has been explored in Langcliffe Pot, the current end is over above the resurgence, and over in distance. A trip to the far end has been described as one of the most serious undertakings in British Caving.