Clough Oughter Castle, Lough Oughter
Near Killeshandra is the impressive Clough Oughter Castle, sited on an island in the middle of Lough Oughter. It was built by the Anglo-Normans in the early 13th century but was soon captured by the O' Reilly clan, the Irish rulers of east Bréifne. Owen Roe O'Neill, leader of the anti-English revolt of the 1640s, died here in November 1649. Clough Oughter is a Marble Arch Caves Global Geopark site.