PC #370: Seegrotte – Austria

Here’s the largest underground lake in Europe, the Seegrotte. It is situated in the village of Hinterbrühl not far from Vienna. The lake is an important historical site, used to be a mine where combat aircraft such as the world’s first jet fighter, the Heinkel He162, were constructed.

Seegrotte

Stamps used include the Steinadler (Golden eagle), the Wörthersee Kärnten lake, and the EU-Präsidentschaft issued in 2006. Thanks to Babsy! ♥

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