Hornindalsvatnet is Norway's and Europe's deepest lake, and the world's twelfth deepest lake, officially measured to a depth of 514 metres (1,686 ft). Its surface is 53 metres (174 ft) above sea level, which means that its bottom is 461 metres (1,512 ft) below sea level. Its volume is estimated at 12 cubic kilometres (2.9 cu mi), its area is 50 square kilometres (19 sq mi) and ranks 19th in area among Norway's lakes. The main outflow is the river Eidselva, which flows into the Eidsfjorden, an arm off the main Nordfjorden.