The pre-Columbian pyramids at Teotihuacan (birthplace of the gods) is one of Mexico's largest and most impressive archaeological sites, dating back to 100 B.C. Located 48 km (30 miles) north of Mexico City, this and the Lady of Guadalupe Shrine on the way is a must day trip for history and archaelogy buffs. Walk along the Avenue of the Dead and take in the imposing beauty of the temples and pyramids of this ancient Mesoamerican city.