The main town on the Mombasa highway is the relatively large service town and sisal-processing centre of Voi, about two-thirds of the way to Mombasa. There are several wildlife-related places where you might think about stopping over for a day or two, including the Kibwezi Forest, Sagala Game Sanctuary, Ngutuni Game Sanctuary and Rukinga Ranch – as well as Tsavo East and Tsavo West national parks themselves.
However you travel south down the highway, it’s worth knowing that the right side of the vehicle is the best place for scenic views. From this vantage you may, in exceptionally clear conditions, see Kilimanjaro, either on the stretch between the small settlements of Sultan Hamud and Kiboko, or to the west of the Tsavo River. Your best chances are in the early morning or late afternoon.