Mecca is a city located in Saudi Arabia and is considered the holiest city in Islam. It is the birthplace of the Prophet Muhammad and home to the Kaaba, the most sacred site in Islam. Every year, millions of Muslims from around the world make a pilgrimage to Mecca, known as the Hajj, as one of the Five Pillars of Islam. The city is filled with historical sites, including the Masjid al-Haram mosque, which surrounds the Kaaba. Mecca is a center of religious and cultural significance for Muslims and plays a crucial role in Islamic history and tradition.