Eas a’ Chual Aluinn in the parish of Assynt, Sutherland, Highland, Scotland, is the highest waterfall in the United Kingdom with a sheer drop of 658 ft (200 m). When in full flow it is over three times higher than Niagara Falls.
The waterfall can be reached by a six-mile walk across boggy ground from the road three miles south of Kylesku in Sutherland. In good weather, a boat-trip runs from the slipway by the Kylesku Hotel to Loch Beag, from where the waterfall is visible.
The name is a corruption of Scottish Gaelic “Eas a’ Chùil Àlainn”, (“waterfall of the beautiful tresses”).