How do we know that the Incan Empire was built in the Andes

The Inca Empire was a vast empire that flourished in the Andean region of South America from the early 15th century A. D. up until its conquest by the Spanish in the 1530s. Even after the conquest, Inca leaders continued to resist the Spaniards up until 1572, when its last city, Vilcabamba, was captured.