The annual pilgrimage to Mecca consists of visiting the various holy spots in and around the city where Prophet Mohammed spent time and received the Word of God.

Image: Pilgrims at Mount Arafat. Prophet Mohammed delivered his final sermon at Arafat, a few months before he died. It was here, Muslims believe, that the last passage of the Quran was revealed to him.

Also See: Indian pilgrims perform symbolic stoning of the devil

Photograph: Muhannad Fala'ah/Getty Images