The principle site in southern Peru is called Pachacamac, about 30 miles south of Lima. It was first occupied about 200 AD, or CE, as they call it now. It was built by the Cuismancu Empire that preceded the Inca Empire by more than a millenium.
Pachacamac is a Huaca, or God, of fire and earthquakes. Huaca is also the generic term for pyramid. The structure above is the huaca, or temple of the sun.
Way back when the Spanish Conquistadores first arrived in Peru, they first went to Cajamarca, and captured the Inca leader, Atahualpa. Before they held him for ransom, and later murdered him, they questioned him about where all the gold was. Atahualpa told them that Pachacamac was the center of worship for all of South America.
It was the location of the powerful oracle of Pachacamac. The oracle was a thick, wooden staff, carved to look like the Huaca, Pachacamac. It was ancient even back then. Inca priests would consult the oracle for guidance about many issues. I think that maybe Atahualpa hoped that if Pizarro and his men went to Pachacamac in search of gold, the oracle would destroy them.
Pizarro sent a contingent of men to investigate. They were dissapointed by the paltry amount of gold, so they destroyed the place out of habit. Somehow the oracle survived, and now stands in the small museum at Pachacamac. It is not much to look at.