What Event Causes The Largest Annual Human Migration?

The largest annual human migration is caused by the Hajj, a religious pilgrimage to Mecca that takes place every year. Over three million people from all over the world travel to Saudi Arabia to take part in the Hajj, making it one of the largest mass gatherings in the world. The journey can be both physically and emotionally demanding, as pilgrims must complete a number of rituals over the course of several days. However, for many Muslims, the Hajj is a once-in-a-lifetime opportunity to perform one of their most important religious duties and to experience the beauty and majesty of Mecca.

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