An enormous geological fault-line, the Great Rift Valley divides Kenya neatly down the length of the country, separating east from west. Lake Naivasha and Lake Nakuru are 2 of the many lakes that have formed in the region. Along the lengths of the Rift Valley are volcanoes, most now dormant. Lake Nakuru has become a national park and supports a wide ecological diversity. It is home to large protected flocks of lesser flamingoes, which turn the lake a vivid pink. It is also famous for it pelicans, black and white rhino, colobus monkeys, as well as, numerous antelopes, buffalo and giraffe. Lake Naivasha is a freshwater lake and is an important lifeline in the area. Its close proximity to Nairobi has made it an ideal weekend retreat. It is a mecca for bird lovers and researchers.