Declared a World Heritage Site, Monte Albán was one of the most important cities in ancient Mesoamerica. During its peak, the majestic city of Monte Albán housed a population of 35,000 people. Monte Albán is Oaxaca´s best example of an urban center with a large central plaza. This tour lasts approximately four hours. Monte Albán is the biggest and most visited archaeological site in Oaxaca, receiving 700,000 visitors per year.