a deep lake in northwestern Scotland, in the Great Glen. Forming part of the Caledonian Canal, it is 24 miles (38 km) long, with a maximum depth of 755 feet (230 m). The lake has long been rumored to be the home of the Loch Ness monster
a large creature alleged to live in the deep waters of Loch Ness. Reports of its existence date from the time of St. Columba (6th century); despite recent scientific expeditions, there is still no proof of its existence