Loch Ness is the second largest Scottish loch by surface area at 56 km2 (22 sq mi) after Loch Lomond, but due to its great depth, it is the largest by volume in the British Isles. Its deepest point is 230 m (126 fathoms; 755 ft). It contains more freshwater than all the lakes in England and Wales combined, and is the largest body of water in the Great Glen, which runs from Inverness in the north to Fort William in the south.