The mountainside retreat above the village of Berchtesgaden is called the Obersalzberg and was the site of the Berghof (Hitler's private vacation home), the Kehlsteinhaus, (known as the Eagle's Nest), and the estates of other ranking Nazi officials. The first mention of the village of Berchtesgaden in historical notes is from 1102. The town was known for its rich salt mines. After changing hands a few times, including being ceded to Austria in 1805, it finally became a part of Bavaria in 1810. The area of the Obersalzberg was purchased by the Nazis in the 1920s.
The Kehlsteinhaus, The Eagle's Nest
The Kehlsteinhaus was a chalet-style building situated on a subpeak of the Hoher Göll mountain known as the Kehlstein. It was completed in 1939 and was intended as a 50th birthday present to Adolf Hitler to use as a retreat and to entertain foreign dignitaries. The last 407 feet up to the Kehlsteinhaus are reached by an elevator that goes straight down the inside of the mountain and linked to a tunnel at the base. There's some debate as to which Allied outfit had the honor of capturing the Eagle's Nest. According to General Eisenhower it was captured by the US Army's Third Infantry Division.