Secret Nazi Underground Base Discovered in Austria (Updated and bumped)

It may have been used for research into nuclear weapons. As should be expected, excavations have been stopped until the discoverers obtain a government permit. Apparently you need a permit for everything....

(Originally posted on Dec. 28, 2014)

Update (1/23/2015): I came across another short article about the newly discovered tunnels, although it does not really provide any additional information--apparently further excavation work has not yet occurred.

This article indicates that the film maker, Sulzer, who made the discovery, had previously found evidence of a large octagonal structure underground at the site.  The concentration camp in question is the KZ Gusen II camp. This article indicates that the camp and tunnels were the site of manufacturing for the Me 262 jet-fighter. A Washington Post article from last month hints that the Nazis may have also been using the facility to work on missiles with biological warheads, as Heinrich Himmler, the head of the SS (and who wanted to develop biological weapons) and Hans Kammler, the director of the Nazi's missile program (among other things), were frequent visitors to the facility. (Kammler was apparently responsible for facilities all over Germany). Or, as a comment below (from Chris Berman?) suggests, the facility may have been related to the Nazi Bell.

I love a good mystery, and Kammler's last days offer a great mystery. There is considerable debate on Kammler's death, or whether he died at the end of WWII. Certainly there is evidence that Kammler and his staff were in  Oberammergau, Germany (near the border with Austria) on April 22, 1945, with a "staff" of 600 people. Thus, it is possible that he was able to successfully flee Germany with a considerable number of Nazi scientists and technicians.