Ngorongoro is, without doubt, one of the world's truly amazing places. It has been called the "8th Wonder of the World", and in 1979 was designated a World Heritage Site. At 20km across, and over 600m deep, it is the largest unbroken, unflooded crater on the planet. Adjacent to the Ngorongoro Crater is the other equally spectacular volcanic scenery such as Embakaai, Olmoti and the frequently erupting Maasai "Mountain of God", Oldonyo Lengai. And yet, despite its dramatic and violent past, Ngorongoro Crater and the surrounding Ngorongoro Conservation Area (the NCA), play host to an incredible concentration of wildlife. But this wildlife extravaganza has also been home to humans for millions of years. At Oldupai Gorge have been found some of the oldest humanoid remains ever discovered. Over thousands of years, different people have come and gone, and today, over 40 000 Maasai and their herds still live and follow their traditional way of life, within the NCA.