🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPolskiTürkçeРусскийالعربية中文EntityQ667775· pop 13· linked from 6 articlesSeegrotte Hinterbrühlthumb|right|Boat tour briefingArticle3 sectionsContentsWorld War II historyReferencesExternal linksthumb|right|Boat tour briefingThe Seegrotte, near Hinterbrühl, Austria, is a cave system with a large grotto located under a former gypsum mine.Read full article (8 paragraphs)ConnectionsAustriaCountryWorld War IIConceptNazi GermanyConceptCategoriesCaves of AustriaGeography of Lower AustriaLandforms of Lower AustriaMines in AustriaMining museums in AustriaMuseums in Lower AustriaNazi subterraneaShow caves in AustriaShow mines