Gaping Gill

"Gaping Gill is perhaps Britain's most famous cave. From the moor on the flanks of Ingleborough in the Yorkshire Dales, Fell Beck plunges 105 metres (360 feet) into the Main Chamber; Britain's biggest known cave chamber."

http://www.bpc-cave.org.uk/gaping_gill.htm


http://en.wikipedia.org/wiki/Gaping_Gill