The Hajj is the Pilgrimage to Mecca in Islam. It is the fifth of the Five Pillars in Sunni Islam and one of the ten Branches of Religion in Shi'a Islam. Every able-bodied Muslim who can afford to do so is obliged to make the pilgrimage to Mecca at least once in his or her lifetime.The government of Saudi Arabia issues special visas to foreigners for the purpose of the pilgrimage, which takes place during the Islamic month of Dhu al-Hijjah. Entrance to the city itself is forbidden to non-Muslims, and the entire city is considered a holy site to Islam.Now ... let's see a lot of people at Mecca.