Yesterday, The Guardian published an article about a study of the Brazilian Amazon that indicates that the long lost mythical city of El Dorado did in fact exist, and existed in pre-Columbian Brazil.

While researchers haven’t actually found a city made of gold, they have discovered 200 earthworks built over a span of 155 miles. The structures date back to between 200 and 1283 AD. There are an estimated 2,000 structures, though many have yet to be examined.

The buildings consist of trenches and mounds, thought to be fortifications or homes. Some researchers believe the lost city could have had up to 60,000 inhabitants, more than some European cities at the time.

The existence of the city defies that notion that advanced civilization could not thrive in the Amazon due to the harsh living conditions and poor soils.

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