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Loch Ness, Scottish Highlands
Loch Ness tops the list for both the mythical monster, Nessie, that is said to live in the loch and for the eerie lake hidden away in the Scottish Highlands. Ness, the loch itself goes 755-feet down at its deepest point and 21.8 miles long. Unlike most lochs, this massive water body makes you wonder what could possibly be lurking in the depths.