14. Olduvai Gorge
If you want to know how humans lived before they became super-intelligent, you have to visit the Olduvai Gorge. As one of the most paleoanthropological sites in the world, it holds great achievements in learning the history of man. This steep ravine is spread along East Africa. If you visit this place, you will learn how humans have evolved. This place is also famous for the tools used by early civilization. Reports say that they look for the materials of their tools from other places and make them from scratch.