Talented engineers and architects Built underground sewer system at San Lorenzo Built pyramids and palaces from stone Also carved giant stone heads Largest is 9 feet tall and weighs 15 tons No one knows their exact function
Talented engineers andarchitects Built underground sewersystem at San Lorenzo Built pyramids andpalaces from stone Also carved giant stoneheads Largest is 9 feet tall andweighs 15 tons No one knows their exactfunction