Clogwyn Du'r Arddu
Clogwyn Du'r Arddu (Welsh pronunciation: [ˈklɔɡwɨ̞n ˈdɨːr ˈarðɨ̞]; 'black cliff of the black height') is a north-facing rhyolite set of cliffs located on the northern flank of Snowdon mountain. Clogwyn Du'r Arddu is considered to be one of the best traditional climbing areas in Britain, and has been called "The shrine of British climbing", and a "crucible for the development of most of the finest climbers in Britain and the scene of many of their finest achievements".