Kenya's outdoor landscape is the benchmark against which much of African wildlife travel is measured. The Masai Mara in the southwest is the Kenya side of the Serengeti ecosystem — wildebeest and zebra cross the Mara River from July to October in the most dramatic animal river crossings in the world, with Nile crocodile in attendance. Mount Kenya National Park delivers glacier hiking to Point Lenana (4,985 metres), the third-highest peak in Africa, on a three-day hike through afroalpine heath above the cloud line. The Samburu National Reserve in the north carries northern specialist wildlife — reticulated giraffe, Grevy's zebra, Somali ostrich, gerenuk — in a semi-arid riverine landscape very different from the Mara. The Great Rift Valley's lakes — Nakuru for flamingo, Naivasha for hippo and fish eagle, Magadi for the alkaline shorebird spectacle — are day-trip landscapes from Nairobi. Then the hidden gems start showing up. No rush.