Building 5 at the ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

The ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

Stela with fragment of calendar on it, possibly part of sundial, ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

Mitla Archaeological Site, San Pablo Villa de Mitla, Oaxaca State, Mexico

Mitla Archaeological Site and San Pablo Church in the background, San Pablo Villa de Mitla, Oaxaca State, Mexico

Looking west in the ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

Looking west in the ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

The ball court at the ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

The Great Plaza with observatory, Monte Alban, UNESCO World Heritage Site, Mexico, North America

The ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

The Great Plaza looking northwest, Monte Alban, UNESCO World Heritage Site, Mexico, North America

Looking west in the ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

The ancient Zapotec city of Monte Alban, near Oaxaca City, Oaxaca, Mexico, North America

Diego Rivera mural at National Palace, 'Zapotec Civilization', Zapotec and Mixtec artisans and gold production, Mexico City, Mexico, North America

Tourist looking at the ruins of Monte Alban, UNESCO World Heritage Site, near Oaxaca, Mexico, North America

Monte Alban Archaeological Site, Monte Alban, near Oaxaca, Oaxaca State, Mexico