Templo Mayor (Tenochtitlan)
Mexico City, Mexico
Double step pyramid on a platform. Height: 27 m. Date: After 1325, rebuilt six times; almost entirely destroyed by the Spanish in 1521.
Main temple, dedicated to Huitzilopochtli and Tlaloc. Originally about 90 feet (27 m) tall according to the Metropolitan Museum; only ruins remain today, and the base measured about 100 by 80 m.