Southwestern highlands with a temperate climate and strong Yemeni influence.
| Eastern Province
Covering the Gulf coast, the center of Saudi oil production
On the Red Sea coast, site of Mecca, Medina, Jeddah and the home of trade and commerce.
The central highlands centered on Riyadh, the home of the Sauds and the most conservative part of the country.
Rarely visited, home to the the Nabataean ruins of Madain Saleh.