This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Mommel. Foto des nrdlichen oberen Tunneleingangs des Hundsrcktunnels des MommelsteinRadweges aufgenommen von Dr Karl Schlemmer im Juni Photo of Hundsrcktunnel Germany taken by Dr Karl Schlemmer in June own original text eigenes Foto Dr Karl Schlemmer de German Karlschlemmer Original upload log page de Mommel Karlschlemmer