As early as 1936 Hitler was sending teams of "Spelunkers" into caves and mines all over Europe searching for the Vril-ya. The Nazi's had also explored Antarctica extensively during the years 1937-38. In search of the fabled hole of the South Pole they apparently had success, like Admiral Byrd, in discovering these entrances. It was here that some say they made contact with the "Unknown Superman" who lived in the fabled "Rainbow City". In his controversial presentation UFO Secrets of the Third Reich, Vladimir Terziski draws a connection between alien beings and such German secret societies as the Tempelhof, the Thule, the Vril, and the Black Sun. Terziski tells of an "alien tutor race" that secretly began cooperating with certain German scientists in the late 1920's in underground bases and began to introduce their concepts of philosophical, cultural, and technological progress." (The Rainbow Conspiracy).
With help from extraterrestrial intelligences, Terziski postulates, the Nazis mastered antigravity space flight, established space stations, accomplished time travel, and developed their spacecraft to warp speeds. At the same time the aliens "spread their Mephistophelean ideas" into the wider German population through the Thule and Vril Societies."
Terziski maintains that antigravity research began in Germany in the 1920's with the first hybrid antigravity circular craft, the RFZ-1, constructed by the Vril Society. In 1942-43 a series of antigravity machines culminated in the giant 350-foot long, cigar-shaped Andromeda space station, which was constructed in old Zeppelin hangars near Berlin by E4, the research and development arm of the SS.