Scotland's LOCH Ness is a large freshwater LOCH in the Scottish Highlands. It is most famous for being the home of the legendary LOCH Ness Monster, which has been the subject of numerous sightings and much speculation over the years. The LOCH is approximately 23 miles long and one mile wide, making it the second largest LOCH in Scotland. It is also the deepest LOCH in the British Isles, reaching depths of up to 754 feet.