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From Openwaterpedia

Hornindalsvatnet is Norway's and Europe's deepest lake, officially measured to a depth of 514 meters (1,686 feet). Its surface is 53 meters (174 feet) above sea level, which means that its bottom is 461 meters (1,512 feet) below sea level. The village of Grodås lies at the eastern end of the lake in Hornindal Municipality and the village of Mogrenda is located on the western end of the lake in Eid Municipality. The European route E39 highway runs near the lake. The village of Heggjabygda and Heggjabygda Church lie on the northern shore of the lake.