On the 30th of April 1945 Adolf Hitler and Eva Braun allegedly committed suicide. However this has been disputed and files released in 2014 by the FBI claim that they have escaped to South America, probably Argentina

I don’t think they did escape and that they did kill themselves in the bunker on that day. The FBI files are discarding eye witness reports from staff that were in the bunker. Rochus Misch,Otto Günsche and Heinz Linge were there at the time and saw the bodies prior to them being carried and burned in the garden of the Reich Chancellery...