Ngorongoro Conservation Area , panoramic view of the volcanic caldera with clouds, Tanzania. This is a World Heritage Site and the floor of the crater is approx. 100 square miles, 6000 ft above sea level (best larger).
John, the rim of the crater from where I took the shot is ~9.5K in altitude (although I didn't notice any difference in my breathing)
Ngorongoro cratervolcanic calderapanoramic viewcloudsTanzania
From Ngorongoro Crater