November 10, 2011, 7am PST
Pilgrimages to holy sites around the world have caused large amounts of waste and pollution because of the large amount of people gathering together for one event and consumeristic habits, writes George Webster for CNN
November 24, 2010, 5am PST
Millions have been in the tent city of Mina in Mecca for the annual Hajj pilgrimage. Though the crowds are temporary, the infrastructure built to handle them is permanent.
November 19, 2010, 6am PST
Millions of religious pilgrims travel to Mecca in Saudi Arabia every year for the Hajj. Officials there have been updating the city to better handle the crowds.
November 30, 2009, 10am PST
New plans have been released by Gensler that show a proposed expansion of the holy city of Mecca.