Erich von Däniken
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The ideas put forth in his books are rejected by virtually all scientists and academics, who categorize his work as pseudohistory, pseudoarchaeology, and pseudoscience. Early in his career, he was convicted and served time for several counts of fraud or embezzlement, and wrote one of his books in prison.
Von Däniken was the co-founder of the Archaeology, Astronautics and SETI Research Association (AAS RA). He designed Mystery Park (now known as Jungfrau Park), a theme park located in Interlaken, Switzerland, that opened in May 2003. Provided by Wikipedia