Lake Titicaca is the heart of the region of Puno and one of the most important points of the South American continent. This wonderful lake connects Peru and Bolivia. It is around 283 m deep and 190 km. long if you consider the territories of both countries. It is the highest and one of the longest navigable lakes in the world. Despite the altitude of the place, the temperature of the water is around 10 C, ideal for aquatic life. The lake houses a great number of animal species such as wild ducks, different birds and fish (suche), and the carachis.
Read more here: https://www.incatrailmachu.com/en/peru/lake-titicaca