Hot air balloon flies underground into Earth for the first time ever

When you hop-skip into a hot zephyr balloon , you expect to fly up . Not anymore . For the first sentence ever , a live aviation balloon was successfully fly down and underground into the Mamet Cave in Croatia . Even comfortably , it was a 70 - year - old man who accomplished the exploit , dip down about 700 invertebrate foot into Earth .

Ivan Trifonov , a seventy - year - old Austrian with a Croatian passport , was the first man to try , and succeed in take flight a hot - zephyr balloon underground . This experienced hot - air balloon pilot is already a proud holder of 4 Guinness record , and flying into the Mamet Cave , impact it ’s bottom and successfully flying out of the Cave is likely to be his 5th record , since no - one has ever done such a thing before . For flying underground Trifonov had to use a hot - air balloon specially design for this strange , and probably unrepeatable venture . His balloon was smaller than common , and the brave pilot set on two gas tanks yoke with brand piping , instead of a basketful .

underground