The western side has a highland dry forest and a permanent river with a riverine forest. To the south are the Athi-Kapiti Plains and Kitengela migration corridor which are important wildlife dispersal areas during the rain season. Man-made dams within the park have added a further habitat, favourable to certain species of birds and other aquatic biome.
Major wildlife attractions are the Black rhino, lion, leopard, cheetah, hyena, buffaloes, giraffe, zebra, wildebeest, elands and diverse birdlife with over 400 species recorded. Other attractions include the Ivory burning site monument, Nairobi Safari Walk, the Orphanage and the walking trails at hippo pools.