Seegrotte: Europe's Largest Underground Lake Was a Nazi Jet Factory – and Burg Liechtenstein

The Seegrotte near Vienna is Europe's largest underground lake – and in 1944 it became a Nazi jet factory. Sixty metres below Hinterbrühl near Vienna lies a lake nobody planned: a gypsum mine flooded in 1912, rediscovered in 1932 – and in 1944 drained and turned into an underground factory for Heinkel He 162 jet fighter fuselages, built by prisoners of a Mauthausen subcamp. A short drive away stands Burg Liechtenstein, the castle that gave its name to an entire country in 1719 – at a time when the family didn't even own it. And in the ruin of Burg Mödling, we find out why a famous legend about Walther von der Vogelweide picked the wrong poet. Filmed on location by Emily & Alex. Chapters: 00:00 A lake nobody planned 00:38 The farmer's well (1848) 01:04 The flood of 1912 01:49 The secret jet factory 02:34 The prisoners of Hinterbrühl 03:15 April 1945 03:43 Hollywood underground 03:59 Burg Liechtenstein 04:49 A country named after a castle 05:27 Buying it back 06:01 Burg Mödling and the wrong poet 07:36 One day, three legends Sources: Wien Geschichte Wiki (KZ-Außenlager Hinterbrühl), Seegrotte (Wikipedia, showcaves.com), Liechtenstein Castle (Wikipedia), Swiss National Museum blog (founding of Liechtenstein, 1719), AustriaWiki (Burg Mödling). Historical scenes are illustrations. #Seegrotte #BurgLiechtenstein #Austria #History #WhereTheLegendEnds