An easy target outside Nakuru, Hyrax Hill has been a human settlement site for at least three thousand years, with finds dating from the Neolithic period immediately before the modern era. Named for the hyraxes that once scampered over this ancient tongue of lava, the prehistoric settlement site was discovered by Louis Leakey in 1926, and subsequently excavated by Mary Leakey ten years later and by others between 1965 and 1987. An excellent guide published in 1983 is on sale in the museum.