In the tropical forests of Mexico and Guatemala stand the sacred sites of the ancient Mayan civilization. Recent scientific discoveries suggest that these monumental temples and pyramids were built to align with not only the heavens, but an equally mysterious supernatural underworld. Travel to the great cities of Palenque, Tikal, and Chichen Itza, where groundbreaking research may locate the most sacred Mayan site of all: the mystical center of the world, which links the underworld, the earth, and the heavens.