Kehlstein is a mountain in the German Alps near Berchtesgaden. It is the famous location of Hitler's Kehlsteinhaus (Eagle's Nest).

The Kehlsteinhaus was commissioned by Martin Bormann, with construction proceeding over a 13-month period. It was completed in the summer of 1938, prior to its formal presentation to Hitler on his 50th birthday on April 20, 1939. It is situated on a ridge at the top of the Kehlstein mountain 1,834 m (6,017 ft), reached by a 6.5 km (4.0 mi) long and 4 m (13 ft) wide road that cost 30 million RMs to build (about 150 million euros in 2007, adjusted in line with inflation). It includes five tunnels but only one hairpin turn and climbs 800 m (2,600 ft).

The last 124 m (407 ft) up to the Kehlsteinhaus are reached by an elevator bored straight down through the mountain and linked via a tunnel through the granite below that is 124 m (407 ft) long. The inside of the large elevator car is surfaced with polished brass, Venetian mirrors and green leather (the elevator is still used daily). Construction of the mountain elevator system cost the lives of 12 construction workers. The main reception room is dominated by a fireplace of red Italian marble, presented by Mussolini. Much of the furniture was designed by Paul László.

A significant event held at the Kehlsteinhaus was the wedding reception that followed the marriage of Eva Braun's sister Gretl to Hermann Fegelein on June 3, 1944. The event was filmed and amongst others Martin Bormann can be seen there. The building is also often called "Hitler's Tea House",[by whom?] but this is a misnomer. Hitler did not treat the Kehlsteinhaus as a tea house, and the location he visited daily for afternoon tea was actually the Mooslahnerkopf Teehaus.

Although the site is on the same mountain as the Berghof, Hitler rarely visited the property. It has been suggested he only visited the Kehlsteinhaus around 10 times, and most times for no more than 30 minutes. However he did receive André François-Poncet (the departing French ambassador to Germany) there on October 18, 1938. Perhaps because of the lack of close association with Hitler, the property was saved from demolition at the end of the war.