Among the archaeological sites at Coropuna is the important Inca site of Maucallacta, on the southwestern flank of the mountain. Some of the structures there were built to evoke the appearance of the mountain. A royal residence, an oracle and a political unit were associated with Maucallacta, and the oracle of Coropuna would have answered the rulers' queries all year round. The Maucallacta site was probably the most important one at Coropuna; the western summit today known as La Niña was apparently also significant.