Some conspiracy theorists believe Adolf Hitler and Eva Braun faked their own deaths in the Führerbunker in Berlin and were spirited away to either Denmark or Spain as Berlin burned. From one of those two locations, they boarded a U-boot and headed for Nazi-friendly Argentina. After living in several different locations in Argentina, they made this house their final destination.
Homes - Famous, Unexplained
Links: gizmodo.com, en.metapedia.org