Photo of: North of Ireland: Fermanagh: Cuilcagh Mountains: View of Cuilcagh Mountain.
This is a view the Cuilcagh Mountain with a thorn tree in the foreground.
The Cuilcagh Mountains has one of the largest expanses of blanket bog in Northern Ireland. The bog vegetation is characterised by luxuriant Sphagnum mosses.
The mountains lie on the Shannon-Erne watershed. The Shannon rises on the north-western slopes of Cuilcagh at Shannon Pot, a steep-sided pool where the underground river emerges. There is a belief in the region that an underground river, the Northern Shannon, connects the waters at Shannon Pot to the River Claddagh, which emerges at Marble Arch Caves and then flows into the Erne. Here a number of streams disappear below ground at swallow holes named Cats Hole, Pollawaddy, Pollasumera and Polliniska, all forming part of the Marble Arch cave system.