In 1979, a Varig Brazilian Airlines cargo jet vanished a half an hour after takeoff from Narita International Airport in Tokyo.
The Rio-bound 707 was carrying 153 paintings by artist Manubu Mabe, valued $1.2 million. The plane, the paintings and six crew members all remain missing. A mid-air heist or simple engine failure? No one knows for sure.
Neither the wreck nor the paintings were ever found, although rumours have appeared online that some of the paintings have appeared in auctions around the world since.
Manabu Mabe missing paintings include these famous pictures: