 This location, the local recreation area of Unterbacher lake/Eller forest and the partial Unterbach forest lying on Erkrath's area makes it into a borough with a high standard of living.Unterbach has about 7,254 inhabitants with a small population density of 795 inhabitants for each km².The Lake Unterbach (Unterbacher See), in the local linguistic usage excavator hole, is a former excavator lake in the quarter Unterbach in the southeast of Düsseldorf.