Hajj is a yearly Islamic pilgrimage to Mecca, the holiest city for Muslims, located in Saudi Arabia.
It is a religious obligation for all physically and financially capable adult Muslims to undertake this journey at least once in their lifetime.
During Hajj, Muslims fulfill one of the Five Pillars of Islam, which are the foundational principles of the faith, alongside Shahadah (declaration of faith), salat (prayer), zakat (almsgiving), and sawm (fasting during Ramadan).