|
The Seegrotte, near Hinterbrühl, Austria, is an underground cave system with a large grotto located under a former gypsum mine. It was closed in 1912 after the mine flooded with 20 million liters of water. It became a tourist attraction after 1930 and has been one ever since, with the exception of World War II.〔("Seegrotte history" ), ''Seegrotte Hinterbrühl Schaubergwerke GmbH'', retrieved on January 3, 2014.〕 The lake is 60 meters below ground, the water surface is 6200 m² and pumps are used to keep the waterlevel down.〔("Lower floor description" ), ''Seegrotte Hinterbrühl Schaubergwerke GmbH'', retrieved on January 3, 2014.〕 Visitors can tour the old mine and take a boat ride across the underground lake. ==World War II history== During World War II the Seegrotte was used for production of Heinkel He 162 jet fighters in Nazi Germany's "second Ruhr".〔 *NOTE: After Allied Operation Pointblank bombing of German aircraft facilities had begun, Nazi Germany dispersed the 27 larger works of the German aircraft industry across 729 medium and very small plants (some in tunnels, caves, and mines): * *〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Seegrotte」の詳細全文を読む スポンサード リンク
|