Tikal is one of the largest archaeological sites and urban centers of the Pre-Columbian Maya civilization. It is located in the archaeological region of the Petén Basin in northern Guatemala. This amazing site is part of Guatemala's Tikal National Park, and in 1979 was declared a UNESCO World Heritage Site. - http://www.oddee.com/item_96671.aspx#oYawMY3t55VtrC6o.99
Yaxhá, Guatemala, is a Mesoamerican archaeological site in the northeast of the Petén Basin region, and a former ceremonial centre and city of the pre-Columbian Maya civilization. Yaxha was the third largest city in the region and experienced its maximum power during the Early Classic period (c. AD 250–600).
Altun Ha in Belize existed by at least 200 BC, perhaps even several centuries earlier, and flourished until the mysterious collapse of Classic Maya civilization around AD 900. Most of the temples date from around AD 550 to 650, though, like many Maya temples, most of them are composed of several layers, having been built over periodically in a series of renewals.