Hornindalsvatnet is Norway's and Europe's deepest lake, officially measured to a depth of . Its surface is above sea level, which means that its bottom is 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.

Hornindalsvatnet is Norway's and Europe's deepest lake, officially measured to a depth of . Its surface is above sea level, which means that its bottom is 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.