Atnsjøen

Atnsjøen is a mountain lake in the Rondane area in Innlandet. On its shore lies the Sohlbergplassen viewpoint on Riksvei 27 between Enden and Folldal, part of the National Tourist Route Rondane. The platform was designed by the architect Carl-Viggo Hølmebakk; it is wheelchair accessible and a starting point for hikes.

It commemorates the painter Harald Sohlberg and his painting Winter Night in the Mountains (Vinternatt i fjellene), which hangs in the National Museum in Oslo. The National Tourist Routes say the view matches the scene in the painting almost exactly, and Hølmebakk also states that the painter's vantage point was near the platform. The dark pines in the foreground of the painting shaped the platform, which was laid out so that no tree had to be cut. A staircase leads down to the lake. The painting's title is sometimes given as Winter Night in Rondane.