Probably from fear for the Hungarians, who burned down Gerresheim and its neighboring places nearly completely, the area was for the first time removed around 900 AD to the castle.
The garden plantings of the castle and the surrounding area were created by the well-known landscape architect Maximilian Friedrich Weyhe, to whose numerous works also belongs the Hofgarten and the world-famous Königsallee.
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.
Around the lake lies the protected area Eller forest, which consists to a large extent of sparse woods.
During the World War II there was a fake airfield of the German air force put there for the deception of allied bombers.
With the surface removal of gravel, groundwater flows through the lake and determines also its water level.
The lake represents an important local recreation area for the region of Düsseldorf.
The Lake Unterbach is administered by a public society, which was created on 7 February 1956 by the neighboring cities Düsseldorf, Erkrath and Hilden.
Unterbach has retained its village character with its active association and church life, firmly established as a geographically separate quarter of Düsseldorf.
The latter had its greatest success with "the stars sparkle", which was originally the slogan song of the session 1997 in the Unterbach carnival.
The Carnival fool's call in Unterbach is the donkey sound "I-A" unlike the Rhineland "Helau" in the rest of Düsseldorf.
The donkey brook flows through the neighboring borough of Eller as well as its lock park behind Unterbach.
By the allocation to Düsseldorf in the framework to the association a large practice hall lying in Unterbach is missing to the local reorganisation and does gymnastics at present in the second federal league.