Ejstrup Lake (Ejstrupholm, Jutland) is privately owned, but there’s a public trail, roughly a 3 km walk, that loops all the way around it. Swimming is allowed.

At the south end, the path runs along a dam that separates the lake from the Holtum River.

The photo was taken with a iPhone 12 mini, I was positively surprised by the multi-layered depth.

Also see: Garden of the Royal Danish Library in Snowfall