Tens of thousands of Muslim pilgrims move around the Kaaba, the black cube seen at center, inside the Grand Mosque, during the annual Hajj in Mecca, Saudi Arabia, Tuesday, Dec. 9, 2008
This doesn't even look real, more like a rendered graphic or something out of Sim City. The photo gallery at Boston.com gives a good insight in the immense logistical challanges posed by the hajj, the annual pilgrimage to Mecca.
The Hajj and Eid al-Adha - The Big Picture - Boston.com