Beinn Alligin (located in Scotlands's historic region called the Highlands) has a great cleft known as Eag Dubh na h-Eighe Achd caused by a rockslide in Britain around 3750 years ago.
Beinn Alligin (Scottish Gaelic: Beinn Ailleagan) one of the classic mountains of the Torridon region of Scotland, lying to the north of Loch Torridon, in the Highlands. The Highlands (Scots: the Hielands; Scottish Gaelic: a' Ghaidhealtachd [ ltxk, 'the place of the Gaels') is a historic region of Scotland. One of the most prominent features of Beinn Alligin is a great cleft known as Eag Dhubh na h-Eigheachd (black gash of the wailing) or Leum na Caillich, which cuts into the ridge south of the summit. It is the scar of the most spectacular rockslide or rock avalanche in Britain, which runs out into the corrie of Toll a' Mhadaidh Mor. It occurred around 3750 years ago and is around 3.5 million cubic metres in volume. 
