Saudi Arabia is a desert nation enveloping the vast majority of the Arabian Peninsula, with Red Sea and Persian (Arabian) Gulf coastlines. Known as the origination of Islam, it's home to the religion's 2 most sacrosanct mosques: Masjid al-Haram, in Mecca, destination of the yearly Hajj journey, and Medina's Masjid a Nabawi, internment site of the prophet Muhammad. Riyadh, the capital, is a high rise filled city.