The series follows the adventures of a young boy named Esteban, who travels through South America in search of the legendary Mysterious Cities of Gold. Along the way, he meets a group of treasure hunters and together they uncover secrets and face challenges.

"Les Mystérieuses Cités d'Or" is a French animated television series that originally aired in 1982. The show is also known as "The Mysterious Cities of Gold" or simply "Cités d'Or". It was created by Mushi Productions and DiC Entertainment.

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