Lost Civilizations of Central America – Planet History

Deep within the jungles of Mexico and Guatemala and extending into the limestone shelf of the Yucatan peninsula lie mysterious temples and pyramids. Civilizations like the Olmec, Maya, Aztec and Inca all built pyramids. Mesoamerican Pyramids served many functions from – from astronomical observatories to places of ritual worship and sacrifice, but who really built these pyramids and why?