Hinterbrühl
Hinterbrühl is a town in the district of Mödling in the Austrian state of Lower Austria. It is home to the Seegrotte, a system of caves including Europe's largest underground lake. During World War II, a satellite camp of Mauthausen concentration camp was opened inside the caverns, producing parts for the He 162 Spatz jet fighter.
History
Hinterbrühl was settled as early as 6,000 years ago.Like neighboring areas, Hinterbrühl suffered mightily under the two Turkish sieges of 1529 and 1683. Since a majority of the population was killed, the area was inhabited by settlers who moved north from Styria after 1683.
From 1883 to March 31, 1932, Mödling and Hinterbrühl Tram, the first electric streetcar in continental Europe, linked Hinterbrühl to Mödling railway station. Today, only the Bahnplatz remains of this historic achievement.
On August 4, 1943 a satellite camp of Mauthausen concentration camp was built in the city. The prisoners there built parts, sub-assemblies and BMW 003 turbojet engines for the He 162 Spatz jet fighter in a hastily converted underground factory during late autumn and spring 1945. The 162, created for the Emergency Fighter Program and the winner of the Volksjäger aviation design competition, was an extremely lightweight, cheap and fast plane that could be discarded if it suffered any damage. Hinterbrühl was just part of a vast crash production program where dozens of factories of varying sizes would make parts for the jet, then send them to sites like Hinterbrühl for final assembly and transshipment to flight test centers — or even directly to airbases, such was the desperate last-minute nature of the enterprise.
In the last days of the war in 1945, the inmates of other camps had to make a 200 km-long march to the concentration camp Mauthausen in Hinterbrühl. Virtually none of them survived. Fifty-one inmates were killed, even before the march, by gasoline injections or strangled by SS-officers. In 1988 a monument was erected above the Subterranean Lake to honor the 51 victims of this massacre.
From 1964, the SOS Children's Villages in Hinterbrühl was led by Austrian pediatrician Hans Asperger.