MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
Tropfloch cave. View looking out from inside the entrance to the Tropfloch sandstone cave in the Sieben Hengste mountains of the Emmental Alps. This cave is in the region known as the Bernese Oberland in the canton of Bern, Switzerland. Photographed in July.
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