The "Eagle's Nest" castle in Bavaria, Germany has a unique feature: a self-supporting, cantilevered stone balcony. - Apparently.
Located atop a rocky outcrop, the Eagle's Nest was built as a retreat for Adolf Hitler in 1938. The balcony, designed by architect Albert Speer, juts out 16 feet from the main structure, with no visible support. The balcony's design was meant to create an impression of grandeur, but it also served a practical purpose: it allowed Hitler to survey the surrounding countryside.
The Eagle's Nest is now a popular tourist destination, and the cantilevered balcony remains one of its most striking features.