 Unterbach is separated by a forest belt from the close-lying boroughs of Düsseldorf.The first hills of the Bergisches Land terminate here at the lower Rhine level and give Unterbach, in comparison to remaining Düsseldorf, a hilly character.Thus Unterbach climbs from here, beginning on Lake Unterbach at the foot of the Korresberg, rising behind the closed land development in the city of Erkrath, to a height of 100 meters.