Hajj is known as the most significant ritual in a Muslim person's life.
This is the fifth pillar of Islam and the rituals performed are based on those made by Prophet Muhammad during his last visit to Mecca, Saudi Arabia.
The pilgrimage must be made by every Muslin who is financially and physically able to once in their lives. The event spans over five days.
One of the main rituals is circling the Kaaba. Hajj symbolizes unity and Islamic's faith in one god, Allah.
Stampedes have been a big issue over the years at the Hajj—this year over 700 people were killed.