Also known as Lake Junín or the Lake of the Kings, Lake Chinchaycocha is located in Junin province and department at 4,080 masl and is part of the National Reserve of Junín (RNJ). It is a very important lake, being the second largest lake in Peru as well as the source of the Mantaro. In its marshes, reed beds and small islands 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 natural importance, Lake Junín has been recognized by the Ramsar Convention since 1997 as a wetland of international importance, and especially as an important habitat for aquatic birds.