Archaeologists have discovered a series of connected caves and tunnels that the Mayans altered to match their stories about the journey to the afterlife. It has been understood that the Mayans viewed caves as sacred, and other altered caves have been found, but this series of caves are the largest ever found. There are underground roads and alters, and carvings dedicated to their gods of death. The caves are located in the center of the Yucatán Peninsula in Mexico.
Watch this video from National Geographic that reports on this discovery, and takes you down in the caves. You can read more about the discovery in this AP story.
