Olduvai Gorge, or Oldupai Gorge, in Tanzania is one of the mostimportant paleoanthropological sites in the world; it has proven invaluable in furthering understanding of early human evolution. A steep-sided ravine in the Great Rift Valley that stretches across East Africa, it is about 48 km (30 mi) long, and is located in the eastern Serengeti Plains in the Arusha Region not far, about 45 km, from Laetoli, another important archaeological site of early human occupation.
Oldupai Gorge (originally misnamed Olduvai) is the most famous archaeological location in East Africa, and has become an essential visit for travelers to Ngorongoro or Serengeti.
At Laetoli, west of Ngorongoro Crater, hominid footprints are preserved in volcanic rock 3.6 million years old and represent some of the earliest signs of mankind in the world. Three separate tracks of a small-brained upright walking early hominid.
Though substantial evidence of hunting and scavenging has been discovered at Olduvai Gorge, it is believed by archaeologists that hominins inhabiting the area between 1.9 and 1.7 my spent the majority of their time gathering wild plant foods, such as berries, tubers and roots.