As the Great Rift Valley grew wider over millions of years, streams cascaded down and formed Lake Manyara. More than 300 different species of birds have been documented in the Lake Manyara National Park. Attracted by the algae that thrive in the lake’s saline-rich waters, huge flocks of birds dressed in every imaginable color gather to feed. An elevated walkway provides unforgettable viewing of the masses of pink-hued flamingos and other bird species that converge on the waters of Lake Manyara. There are also plenty of hippos lazing in the saline-rich waters and along the sunbaked shoreline.