Also known as Lake Junín or the Lake of the Kings, Lake Chinchaycocha is located in Junín province and department at 4,080 metres (13,386 feet) above sea level. It is a very important lake as it is the second largest in Peru and the source of the Mantaro river. In its marshes, reed beds and small islets there live thousands of resident and migratory birds, frogs, wild guinea pigs, foxes and viscachas, which have adapted to the icy climate of the puna.
The area is well-suited for growing maca, a Peruvian root famous for its high vitamin content. Due to its importance to nature, Lake Junín was recognised by the Ramsar Convention in 1997 as a wetland of international importance, particularly as an important habitat for water birds.