The Heldenfinger Kliff is a part of the cliff-lined coast of the Tertiary Sea which existed 15 million years ago. The persistent impact of the waves chiselled a typical hollow out of the Upper Jurassic rock here. This is why the cliff line at Heldenfingen in the District of Heidenheim has become famous and is of scientific importance. The hollow itself as well as the rock underneath and above is covered in large bore holes from piddocks and small holes from boring sponges. The cliff is located in the Gerstetten suburb of Heldenfingen and there is also a playground suitable for several generations and the Primordial Ocean Path.