Recently, new satellite imagery detected a hidden kingdom in the Amazon that had eluded explorers for nearly 500 years.
Some called it El Dorado, others, like Colonel Percy Harrison Fawcett (a British version of Indiana Jones) cryptically named it the "City of Z."
The jungle swallowed them all, and no evidence has ever been produced that such a place existed.
Now the satellite imagery of deforested sections of the upper Amazon Basin revealed more than 200 geometric earthworks.
Sculpted from the clay rich soils of Amazonia as perfect circles and squares, these structured earth mounds, or "geoglyphs," are located on the east side of the Andes and span a distance of 155 miles.
Built long before Christopher Columbus set foot in the new world - the sites date from 200 to 1283 A.D.– the earthworks are the remains of roads, bridges and squares that formed the basis for a lost civilization, according to a study published in the journal Antiquity.
Denise Schaan, co-author of the study and anthropologist at the Federal University of Pará, in Belém, Brazil, tells Discovery News about this intriguing finding.