Main Page | See live article | Alphabetical index The Olduvai Gorge is a steep-sided ravine, part of the Great Rift Valley which stretches along eastern Africa. Olduvai is in the eastern Serengeti Plains, northern Tanzania, east Africa. Olduvai is the location of the first monolith in Arthur C. Clarke's 2001: A Space Odyssey series of books. This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.