ACTIVITIES	HALF DAY EXCURSIONS

Whole day excursions

Half day excursions

Klosterneuburg	Kreuzenstein Castle	Lainz & Hermesvilla	Hinterbrühl grotto
Spanish Riding School	Gumpoldskirchen	Beethovengang	Perchtoldsdorf
Red Vienna & Kahlenberg	'Am Himmel'	UNO-City	Steinhofgründe
Belvedere castle	Museumsquartier	Laxenburg	ActiLingua's district

Hinterbrühl grotto

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Just south of Vienna hides Europe’s largest subterranean lake. How comes? The unique natural monument of Hinterbrühl grotto is the result of a tragic catastrophe. In 1912 a gallery of a gypsum mine collapsed and the whole mine was flooded. During World War II the former mine was pumped dry in order to build military aircrafts without fear of allied air raids. The first jet in history was built in one of the grottos. After the war the former mine was flooded once more. Some of the galleries and remains of the national socialist air craft factory have been spared und were turned into a museum. An intriguing boat trip on a subterranean lake spanning 6300 sqm rounds off our visit! Bring warm clothes! The temperature in the grotto remains constant at 8° C (46.4 F) during the whole year.