A series of ring-shaped ditches in the Brazilian Amazon shows that a sophisticated civilization once existed in the rainforest. Could it have been the mythic city of El Dorado? Or is it linked to similar religious sites in the Andes Mountains? Or perhaps the work of ancient aliens?
With Molly Brandenburg & Richard Rossner
About Unexplained Mysteries
“We don’t know.” answers too many questions. But in this podcast, we don’t take “we don’t know” for an answer. Every Thursday, Unexplained Mysteries investigates the greatest mysteries of history and life on earth, because the answer “we don’t know” is always the scariest. Unexplained Mysteries is part of the Parcast Network and is a Cutler Media production. Ad-free archives of episodes six months or older are now available through Stitcher Premium.