What is "hvalvatn"

The lake Hvalvatn is situated some kilometers to the east of Hvalfjörður in the western portion of Iceland. It lies to the east of the volcano Hvalfell. The surface measures 4.1 km², and its greatest depth is 180 m.

Not far from Hvalvatn is Glymur, the highest waterfall in the country. Hiking trails lead both to the lake and to the waterfall.