Blauhöhle, Cave entrance in Blaubeuren, Germany
Blauhöhle is an underground cave system in Blaubeuren that runs through multiple levels of limestone beneath the Swabian Alps. The three floors of the system connect through narrow passages and wide chambers that can only be reached underwater.
The entrance to the cave system was discovered in 1967 when divers first found the passage at the bottom of the Blautopf spring. Over the following decades further expeditions explored the branching tunnels and uncovered traces of early human settlement.
The cave holds numerous discoveries of ancient human artifacts and ceramic fragments, indicating early human presence in the Swabian Alps region.
Access requires diving equipment and experience with cave diving as the passages lie underwater and are sometimes very narrow. Thorough preparation and guidance from experienced divers are necessary to navigate safely through the system.
One of the largest rooms in the system is called Apokalypse and measures roughly 170 meters in length. The ceiling of this chamber reaches up to 50 meters in height and forms one of the largest known underground voids in the region.
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