Famed for its natural beauty, as well as the evidence it has produced about human evolution, Tanzania's Olduvai Gorge is also a popular stop for tourists. Also called Oldupai, the official name since 2005, the gorge is where Mary and Louis Leakey discovered evidence some of the oldest known human species here, and excavations continue to this day. In fact, it was one of the Leakey sons who would find a fossil fragment of the first human species in Olduvai Gorge in 1960.
Olduvai Gorge is known by some as the “cradle of humankind,” with evidence of human species inhabiting the area roughly 1.9 million years ago.
While excavations are ongoing, particularly during the dry seasons, it's possible to see the areas where digs are happening. You can't access the site without an official guide, but tours are available year-round.