QUINTANA ROO, MEXICO—Mexico News Daily reports that a bottle-shaped chultún, a structure usually used by the Maya to catch rainwater, has been discovered in the floor of a cave by researchers from Mexico’s National Institute of Anthropology and History (INAH). The cave is located within Tulum National Park, the site of a walled Maya city situated on the Yucatán Peninsula’s Caribbean coastline. Archaeologist Enrique Marín Vázquez said that the chult&u