The Eagle's Nest (Kehlsteinhaus)

https://en.wikipedia.org/wiki/Kehlsteinhaus#Construction

http://www.uncommon-travel-germany.com/eagles-nest-germany.html

https://www.google.ca/search?q=the+eagles+nest&oq=the+eagles+n&aqs=chrome.1.69i57j0l5.7355j0j7&sourceid=chrome&ie=UTF-8

https://www.google.ca/search?q=the+eagles+nest&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjC-dPjw5XMAhVYz2MKHfNpBW0QsAQILA&biw=1280&bih=699