There is a video on Youtube that shows what is purported to be a "Real German UFO Base in Brasil". To say the least, the images are intriguing. But is it the real deal? I dont know, but heres the link so you can watch it yourself and make up your own mind.
Rumors of a NAZI base in Antarctica are not rumors. They actually built one there during WWII. Rumors that it is still active, and that it is the home of NAZI UFO activity? Could they be operating from Brazil? Again, anything is possible. View the video and make up your own mind. It is, at least, interesting to contemplate. See The Video