England - Yorkshire dales - Malham Tarn 03

Malham Tarn is England's highest freshwater lake. The Tarn level was raised by Lord Ribblesdale in the 19th century by means of a dam and sluice gate at the southern end of the tarn. Malham Tarn drains at Tarn Foot into a small stream known as Malham Water that soon disappears into the limestone at Water Sinks. The water then reappears not as was originally thought at the base of Malham cove, but at Airehead Springs South of Malham and West of Malham Beck or the River Aire beside the footpath between Malham and Hanlith Mill, Kirkby Malham. This is known as the source of the River Aire.