I saw this when it was shown recently on TCM, because I have enjoyed Jean Paul Belmondo's films, particularly "The Burglars". Also this film had supposedly provided some inspiration for the "Indiana Jones" films.
Belmondo is a playboy type, living on a ship, who is propelled into an adventure. There is no logical plot to speak of, just a continuous series of madcap events. Some incidents are entertaining, and others less so, but in any event the movie is best viewed with the brain set in neutral. The scenes involving a balloon and also the escapades on scaffolding are particularly amusing.
Inspiration maybe, but comparisons to "Indiana Jones" would seem to be superficial. This movie is more light hearted, and Belmondo is more of a bumbler than a fearless adventurer. There is a scene with a vine bridge across a canyon, which was also part of "Temple of Doom's" plot, but that aside there are no obvious similarities.
Ursula Andress however, appears on a beach in a white bikini very similar to the one she wore in "Dr. No".
In summary, this is not bad if you don't mind a scattered but creative plot. See this if you have the chance just for the experience. It's fun, but not quite for everyone.
K-Rating: 5/10