Shannon Pot (from Irish Log na Sionna, meaning 'hollow of the Shannon') is a pool in the karst landscape in the townland of Derrylahan near Cuilcagh Mountain in County Cavan, Ireland. An aquifer-fed naturally fluctuating pool, it is the traditional source of the River Shannon. It has connections, through the Shannon Cave system, to other pools, including two in County Fermanagh. The pool itself is about 16 metres (52 ft) wide and has been dived to 14.6 m (48 ft) depth. Settlements near the Shannon Pot include Dowra, Blacklion and Glangevlin.
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River Shannon's source in the context of Lough Allen
Lough Allen (Irish: Loch Aillionn) is a lake on the River Shannon in northeastern Connacht, Ireland. Most of the lake is in County Leitrim, with a smaller part in County Roscommon. The lake lies to the south of the River Shannon's source, near the Iron Mountains, and is the uppermost of the three main lakes on the river. The other two, Lough Ree and Lough Derg are much further to the south.
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