Multiple choice general knowledge culture

I was built for my owner's 50th Birthday by his personal secretary, originally intended to be a "Teahouse" but later kept as a planned refuge of last resort for my master. My master who admitted to be acrophobic built me at an altitude of 1834 meters. The bombing and battles of World War II left the building intact but remained a part of US Armed Forces till they returned the area to the country it belonged to, in the 1990s.

  1. Eagle's nest

  2. Neuschwanstein Castle

  3. Ljubljana

  4. Hartheim Castle

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Eagle's Nest (Kehlsteinhaus) was built as a 50th birthday gift for Adolf Hitler by Martin Bormann, his personal secretary. Despite Hitler's fear of heights (acrophobia), it was constructed at an altitude of 1834 meters in the Bavarian Alps. Though intended as a teahouse and potential refuge, Hitler rarely visited. The building survived World War II bombings and was used by US forces until being returned to Germany in the 1990s.