The region between the Elbe and Weser rivers (the triangle of Bremen, Hamburg, and Cuxhaven) forms the Elbe–Weser triangle (German: Elbe-Weser-Dreieck), also rendered Elbe-Weser Triangle, in northern Germany. It is also colloquially referred to as the Nasses Dreieck or "wet triangle".
The Elbe–Weser triangle is a geographical region and, historically and politically, corresponds roughly to the former territory of Bremen-Verden and formed the major part of the former Stade Region. Today the Elbe–Weser triangle belongs to Lower Saxony outside the borders of the Hanseatic cities. The Stade Regional Association (Landschaftsverband Stade) operates within the Elbe–Weser triangle as a regional cultural organisation.
The terrain is largely flat and comprises mudflats, marsh, bog and geest, mainly the Stade Geest. Other areas are characterised by partially dried out bog, such as the Teufelsmoor or the Altes Land and raised bogs, like the Ahlenmoor, Langes Moor, Hymenmoor and Königsmoor, with peat layers of two to six metres. Typical of the scenery are broad ridges of geest, often covered with pine or mixed woods, heathland and natural rivers such as the Oste, Geeste, Lower Elbe, Lune, Hamme or the Wümme. In the northern part of the area the only ridge is the Wingst, up to 74 metres (243 ft) high.