Devil's Hole

The Devil's Hole lies beneath the North Sea east of Scotland, a group of deep trenches cut into the surrounding seabed. The steep-sided hollows descend far below the neighbouring floor, creating an abrupt change in depth beneath an otherwise open expanse of water. The sea above belongs to the broad crossing between Britain and Scandinavia, where sailors navigating without sight of land depended on their instruments, experience and the weather as well as their knowledge of coastal approaches.