A certain pilgrimage is the Hajj, which is an Islamic pilgrimage to Mecca, Saudi Arabia. It is one of the five pillars of Islam and is a mandatory religious duty for Muslims who are able to make the journey. The Hajj is a spiritual journey that involves a series of rituals performed over five days. It is a time of reflection and prayer, and is seen as a way to cleanse the soul and bring the pilgrim closer to God.