Fell Beck is a stream located near the foot of Ingleborough

Ingleborough

Ingleborough is the second highest mountain in the Yorkshire Dales. It is one of the Yorkshire Three Peaks, the other two being Whernside and Pen-y-ghent. Ingleborough is frequently climbed as part of the Yorkshire Three Peaks Challenge, which is a 24-mile circular challenge walk starting and...

, in the Yorkshire Dales National Park

Yorkshire Dales

The Yorkshire Dales is the name given to an upland area in Northern England.The area lies within the historic county boundaries of Yorkshire, though it spans the ceremonial counties of North Yorkshire, West Yorkshire and Cumbria...

. It is notable for the fact that it runs into Gaping Gill

Gaping Gill

Gaping Gill is a natural cave in North Yorkshire, England. It is one of the unmistakable landmarks on the southern slopes of Ingleborough – a deep pothole with the stream Fell Beck flowing into it...

, the second largest natural cave shaft in the UK (after Titan

Titan (cave)

Titan is a natural cavern near Castleton in the Derbyshire Peak District, and is the deepest shaft of any known cave in Britain, at . The existence of Titan was revealed in November 2006, following its discovery on 1 January 1999 after cavers discovered connections from the James Hall Over Engine...

). As it falls down the shaft for 110 metres it is the tallest unbroken waterfall in the UK. It later emerges as Clapham Beck in Beck Head Cave. This was proven by fluorescent dye tests many years ago, but only confirmed by cave divers in the 1983. At times it is blocked off by a temporary dam

Dam

A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

to allow members of the public to descend the shaft on a winch.