Mamet Cave Croatia - First air balloon flight to the underground

Exactly ten years after the recording of Felix Baumgartners base-jump in the Mamet Cave went around the World, this abyss on Velebit Mountain became the scene of another incredible daredevil venture. Ivan Trifonov, a seventy-year-old Austrian with a Croatian passport, was the first man to try, and succeed in flying a hot-air balloon underground. This experienced hot-air balloon pilot is already a proud holder of 4 Guinness records, and flying into the Mamet Cave, touching it’s bottom and successfully flying