メッカ is a city in Saudi Arabia and is considered the holiest site in Islam. It is the birthplace of the Prophet Muhammad and the location of the カーバ (Kaaba), a cube-shaped structure that Muslims face during their daily prayers. Every year, millions of Muslims travel to メッカ to perform the ハッジ (Hajj), a pilgrimage that is one of the Five Pillars of Islam. The city is located in a desert valley and has a population of over two million people. メッカ is not only a religious center but also a cultural and economic hub, with numerous mosques, hotels, and markets catering to the needs of pilgrims and visitors.