The authentic ``Big Game`` country, the Selous Game Reserve is the world's largest game reserve, with impossibly high numbers of elephants, buffalos and black rhinos, and the continent's greatest concentrations of the endangered Wild Dog, and hippos and crocodiles, the latter found mainly in the reserve's major landmark- the mighty Rufiji River, which drains into the Indian Ocean. The Selous Game Reserve, named after the naturalist Frederick .C. Selous, can be explored by car or by boat, silently drifting through the swamps and lagoons on the Rufiji, and being able to observe the elephants close by as they come to the water to drink or to bathe or even on foot, an unforgettable experience of walking, accompanied by rangers, past the lairs of wild animals, a different take on game viewing.