The river Nidda used to meander through the area. The right bank of the Nidda in particular was repeatedly affected by flooding, which is why no construction was carried out here. Only the castle stood here, presumably so that the moat could be flooded with Nidda water.
The left bank was a little higher, but damage still occurred here. After minor measures over the centuries, the Nidda was channeled in the 1960s. The course of the river was drastically changed and the old weir was demolished. The river bend at the castle was also removed and the area of today's castle park was created.
The approximately 7 hectare castle park was then created in the 1970s based on the model of English landscape gardens with wide lawns and flower beds.
The castle park was gradually developed into an arboretum, a collection of deciduous and coniferous trees from all over the world.