The Mysterious Cities of Gold

Does anyone remember this early 80's cartoon? Around the time of Astro Boy etc - based on mayan legend I beleive. It was in '83 so I would have been 5 or 6 at the time but it captured my imagination like nothing else! There was a character called Estoban (I think) - and some kid with weird hair.
I think it might have been called "El Dorado and the Mysterious Cities of Gold".
Classic!
I think it might have been called "El Dorado and the Mysterious Cities of Gold".
Classic!