The uneven sinkhole area was created by the erosion of caves in the limestone. In the entire urban area of Wuppertal, the caves created from former coral reefs repeatedly lead to problems with the stability of buildings and to blocked parking lots and roads.
The many quarries in the area also bear witness to this geological past.
The sinkhole area Im Hölken is located directly on the northern railway line.
April 10, 2021
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