First of all, Saudi Arabia is known as "the Land of the Two Holy Mosques". Two of the holiest sites of Islam are located in Saudi Arabia. Medina - the city where the Quran was finally approved, and where Prophet Muhammad was buried, and Mecca, the birthplace of Muhammad. Every year, millions of muslims perform hajj and visit Al-Masjid al-Haram - the Sacred Mosque. Unfortunately, the entry is prohibited for non-Muslim people. The citizens of the country live under Sharia law, which impose certain obligations. For example, the usage of drugs and alcohol is forbidden. Gambling is also under the ban. Expats have a possibility to live in special reservations - compounds, where some concessions are allowed, for example, the appearance of women is not so strictly regulated and they have a right to drive there.