The fifth and final pillar of Islam is the Hajj, a pilgrimage which every able-bodied Muslim must complete once in their lifetime if they can afford it. During the month of Dhul Hijjah, the twelfth month of the Islamic lunar calendar, upwards of 2 million Muslim pilgrims travel to Mecca in order to take part in the rite.
Photo caption: Supplicating Pilgrim at Masjid Al Haram. Mecca, Saudi Arabia Credit: Ali Mansuri / CC BY-SA 2.5
Sources:
» BBC.. "Hajj: pilgrimage to Mecca" September 8, 2009.
» UPI.com. "Hajj attracts some 3 million pilgrims." November 16, 2010.