While there are some significant mountain ranges, such as the Asir Mountains in the southwest and the Oman Mountains in the east, the majority of the peninsula is characterized by:

* Vast plains: The Empty Quarter (Rub' al Khali) is the largest sand desert in the world, covering a significant portion of the peninsula.

* Rolling hills: Low hills and undulating terrain are common, particularly in the central and northern regions.

* Low tablelands: These flat, elevated areas are found throughout the peninsula, with some reaching altitudes of over 1,000 meters.

While the mountains are impressive, they cover a smaller percentage of the peninsula's total land area compared to the plains, hills, and low tablelands.