Africa's Great Rift Valley runs three thousand miles from the Red Sea to the mouth of the Zambezi. It's a diverse terrain of erupting volcanoes, forest-clad mountains, spectacular valleys ...

Running along the top of this chain of mountains is a deep crack, called a rift valley. It is here that new ocean floor is continuously created. As the two sides of the mountain move away from ...

The trio is located in Ethiopia's Great Rift Valley, around 125 miles (200 kilometers ... which dump brown sediment from nearby mountains into the water — giving it its yellow color.