Nasvatn is a lake in the municipality of Åmli in Agder county, Norway. It is located about north of the village of Hillestad in the mountains above the Tovdal river valley. The lake has a small dam on the southwestern end, and the water leaving the lake goes down a large waterfall and eventually drains in the river Tovdalselva. See also List of lakes in Aust-Agder References Lakes of Agder Åmli