Eider-Treene Depression

The Eider-Treene Depression (German: Eider-Treene-Niederung; Danish: Ejder-Trene-Sænkningen) is a landscape in west Schleswig-Holstein in North Germany.

It includes one third of the moorland (bog) in the state and is a habitat to the largest inland group of meadow birds.

To the north, its border runs between Hollingstedt and Treia, to the east near Rendsburg, to the south the boggy depression reaches to the Hanerau and Haalerau beyond the Kiel Canal.

The landscape was formed during the ice ages, and altered by man as a result of dams and weirs built across the Eider, which was still a tidal river as far as Rendsburg until the 1920s.

The region recently is encouraging "nature tourism" with walking, riding, cycling and canoe trips.