Camlough Lake – the "crooked lake"

Camlough Lake was formed as a glacial ribbon lake, and takes its name from its irregular shape; although its modern form does not appear particularly crooked, its shape was much less regular in the past before its level was raised by the embankment built in the late 19th century. The glacial left-over sits in a valley carved between Slieve Gullion and Camlough Mountain and is today the largest lake in the Ring of Gullion.

Close to the shore of the lake is an approximately one kilometre long tunnel, wide enough to drive an articulated truck into, which was excavated in the 1960s as part of a planned development intended to create a man-made cavern within Camlough Mountain which was to have been used to store and release water to generate electricity. It was planned that the pumped hydro storage scheme, when operational, would generate more than 200 megawatts of electricity had it been completed; however, plans were shelved with the onset of The Troubles.