Tsavo National Park consists of two separate parks, Tsavo East National Park and Tsavo West National Park. Together they make up the largest national park in Kenya. The park was split into east and west when a railway and main road were built between Nairobi and Mombasa. Tsavo East National Park is generally flat, with dry plains and more opportunities to spot wildlife. Tsavo West National Park is more mountainous and has a wetter climate, with a more diverse landscape.