Archeologists in Mexico think they might have discovered Xibalba, a mythical Mayan underworld also known as the "place of fear." After some serious scuba diving and inching across deeply submerged underwater tunnels near the Yucatan peninsula, investigators reached an entrance to a bunch of dry chambers with the stone ruins of eleven sacred temples and a 330-foot long road. There were also lots and lots of human bones. According to the ancient Mayan scripture Popol Vuh, the entrance to Xibalba was once protected by rivers filled with blood, scorpions, and pus, and houses swarming with shrieking bats.
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