At nearly 3,800 meters above sea level on the treeless Bolivian altiplano near Lake Titicaca, Tiwanaku flourished from roughly 300 to 1000 CE as a city, ritual center, and regional power. Raised-field farming fed its population despite killing frosts; precisely fitted stone blocks — including the famous Gateway of the Sun — still stand. Influence spread across the southern Andes through ritual authority and exchange rather than outright conquest. Centuries after its abandonment, the Inca declared it the place where their creator made the sun and humankind. It remains a key symbol of Aymara identity today.
The Inca later tied this region to their stories of creation. High on a cold, treeless plateau near Lake Titicaca, almost 3,800 meters up, where most crops should fail and the air thins to a struggle, stand the ruins of Tiwanaku. Its builders fed a large population by raising their fields into long planted ridges that fought off the killing frost. They cut and fitted massive blocks of stone so cleanly that later peoples could not imagine human hands had done it. They carved a single great gateway with a staff-bearing god at its center. When the Inca rose nearby, centuries after Tiwanaku was abandoned, they looked at these monuments and decided this was where their creator had made the sun, the moon, and humankind itself.