Cuilcagh
 Cuilcagh (Irish: Binn Chuilceach) is a mountain on the border between County Fermanagh (in Northern Ireland) and County Cavan (in the Republic of Ireland). With a height of 665 metres (2182 ft) it is the highest point in both counties and the 165th highest on the island of Ireland. Water from the southern slope flows underground until it emerges some miles away in the Shannon Pot the traditional source of the River Shannon.