Rhino sightings are the hardest of the Big Five to guarantee on open savanna because populations are small and closely protected against poaching, which means the best odds come from parks and conservancies purpose-built around rhino security rather than general wildlife density. Kenya's Lake Nakuru National Park is fully fenced specifically to protect both black and white rhino, and sightings there are genuinely reliable — among the best in the region for a standard game-drive-style encounter. Private conservancies bordering the Maasai Mara ecosystem run similarly intensive rhino protection with excellent guide-to-guest ratios, worth building into a Kenya itinerary specifically for this. Tanzania's Ngorongoro Crater holds a small, ancient black rhino population, visible from the crater floor though sightings require patience and are never guaranteed on a single visit. Uganda's rhino story is different again — the country's wild population was hunted to extinction decades ago, and today's population exists at the dedicated Ziwa Rhino Sanctuary, where you track rhino on foot with an armed ranger rather than by vehicle, a genuinely different and memorable experience worth adding as a stop between Entebbe and the western parks.