Mecca is the focus of the hajj, (pilgrimage) that every Muslim must try to make at least once in his life. At centre of the Great Mosque complex (al Haram) sits Kaaba, a windowless black edifice said to have been built by Abraham, the Hebrew patriarch.
Muslim worshippers perform the evening prayers at the Kaaba, Islam's holiest shrine.
I've been lucky enough to have been able to perform Hajj eight times.
Suhaib Salem / Reuters
Roughly 2 million Muslims were expected to go on Hajj this year.
Many of them have been waiting since 2013.