Step Right into the Mayan Underworld at Rio Secreto
Here—you quickly learn—time slows down. Only discovered in 2007, the Rio Secreto underground river has been carving out this 8-mile-long cave system for centuries—or even millennia. Though most cave systems in the world are underwater, Rio Secreto is only partially flooded, making it possible to enter and visit the Mayan underworld. The Gods at Rio…
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