I read about this story in a book back then, and it always intrigued me.

Back in World War II, where did Nazi Germany obtained their ideas for their wonder weapons? These experimental weapons were so powerful that if they were ever fully completed they could have won the war and ushered in a new era of antigravity technology.

Seemingly impossible to construct and transport – Ancient megaliths remain the subject of awe and speculation to modern society. Has ancient knowledge been hidden or lost over time?