The Mysterious Cities of Gold - Season 1 - Eps 39: End of the City of Gold
The Olmecs place the Sun Power Unit at the bottom of their sunlight collecting crystal and activate it. However, the unit does not behave as expected and the Sun Power Unit begins to overheat. The High Priest of the Cities of Gold, who turns out to be Esteban's father, tries to shut it down using Tao's jar which is actually a control unit. But he could be too late.
About The Mysterious Cities of Gold

Title: The Mysterious Cities of Gold
First Air Date: 1982-06-29
Last Air Date: 2021-01-29
Status: Ended
Rating: 7.7/10 (from 72 votes)
Language: JA
Seasons: 5
Total Episodes: 117
Network: NHK G
Genres: Kids, Animation, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Pierrot, DIC, NHK
Synopsis
The adventures of a young Spanish boy named Esteban who joins a voyage to the New World in search of the lost Cities of Gold and his father.
Cast

Rei Sakuma
Zia (voice)

Masako Nozawa
Esteban (voice)

Isao Sasaki
Mendoza (voice)

Junko Hori
Tao (voice)