Egypt's Great Pyramid of Giza, which stands 481 feet (147 meters) high, is the world's tallest pyramid. But the world's largest pyramid lies half a world away in Cholula, Mexico. Tlachihualtepetl, or the Great Pyramid of Cholula, is about 217 feet (66 meters) tall with a base of 1,476 by 1,476 feet (450 by 450 meters). The pyramid boasts a total volume of 157 million cubic feet (4.45 million cubic meters). This is almost twice that of the Great Pyramid of Giza.