n.
Lake, east-central Northern Ireland.
It is the largest lake in the British Isles, with an area of 153 sq mi (396 sq km). It is about 15 mi (24 km) wide and 18 mi (29 km) long, though it is only about 40 ft (12 m) deep. Ancient deposits in Toome Bay, on its northwestern shore, have yielded the oldest recorded human artifacts in Ireland. In 1959 flood-control works significantly lowered the lake level.