Tangentially, Mysterious Cities of Gold played in the U.S. in the 80s, on the children's cable network Nickelodeon, along with another French show they called

Tangentially, Mysterious Cities of Gold played in the U.S. in the 80s, on the children's cable network Nickelodeon, along with another French show they called Spartakus and the Sun Beneath the Sea, evidently titled Les Mondes Engloutis in France. I also loved these shows as a kid!