01/11/2026
Hidden beneath a grassy hill in Puebla, Mexico, the Great Pyramid of Cholula (known locally as Tlachihualtepetl, “man-made mountain”) is the largest pyramid in the world by volume. While the Great Pyramid of Giza stands taller (146.6 m), Cholula’s massive base measures approximately 450 × 450 meters (about 202,500 square meters), making it four times larger in footprint and containing an estimated 1.8 million cubic meters of material—far exceeding Giza’s 2.58 million cubic meters in volume when accounting for its terraced, multi-layered construction.
Built in phases starting around 300 BC by the pre-Columbian peoples of Cholula (and expanded by later cultures), the pyramid reached a height of about 66 meters with a base covering 18 hectares. It was topped by a temple to Quetzalcoatl, the feathered serpent god. Over centuries, the structure was abandoned, covered by earth, vegetation, and eventually a colonial church (Iglesia de Nuestra Señora de los Remedios) was built on its summit in the 16th century—completely concealing the ancient pyramid beneath what now appears as a natural hill.
The pyramid’s true scale was only fully realized in the 20th century through excavations. Tunnels dug into the hill revealed seven nested construction layers, showing continuous rebuilding over 1,500 years. Today, visitors can walk through the 8 km of underground tunnels, marveling at the sheer size and engineering of this forgotten giant.
Cholula’s pyramid is a testament to Mesoamerican ambition: a sacred mountain built by human hands, so massive that nature and time disguised it as a hill—hiding the world’s largest pyramid in plain sight.