Which two cities are primarily known for pilgrimage in Saudi Arabia?

Mecca and Medina are two cities of immense significance in Islam, primarily known for their roles as pilgrimage destinations. Mecca is home to the Kaaba, located within the Masjid al-Haram, which Muslims around the world face during prayer. It is also the site of the Hajj pilgrimage, one of the Five Pillars of Islam that every Muslim is required to undertake at least once in their lifetime if they are able. Medina, the second holiest city in Islam, is where the Prophet Muhammad migrated and established the first Muslim community. It houses the Prophet's Mosque, which is also a vital place of worship and pilgrimage for Muslims. These religious and historical significances firmly establish Mecca and Medina as the primary pilgrimage cities in Saudi Arabia, making them central to Islamic faith and practice.