Amantani is an island on the Peruvian side of Lake Titicaca. According to a 1988 census, it has a population of 3,663 Quechua speakers divided among about 800 families. The island is circular and about 9.28 km² in size. It has two mountain peaks, Pachatata ("father earth") and Pachamama ("mother earth"), with ancient Inca and Tiwanaku ruins on top of both. The hillsides are terraced, mostly worked by hand, and planted with wheat, quinoa, potatoes, and other vegetables.