The Tuwaiq Mountains Formation , located on the western and southwestern sides of al-Rub' al-Khali (Empty Quarter ) Desert in the Kingdom of Saudi Arabia, is made from limestone. It is considered one of the important geological formations with visible outcrops, representing the oldest formation in the Empty Quarter Desert. In general, the Empty Quarter Desert is the largest continuous desert in the world, covering an area of about 550,000 km². It was formed in a wide, low-lying area dur...

Aliyah Plateau , also known as al-Ulayyah or al-Alah, is a large plateau with steep edges, surrounded by deep valleys, ravines, and caves, including the cave of Imam Turki Bin Abdullah , who sought refuge there after the fall of Diriyah . It is located on al-Yamamah mountain within the Tuwaiq mountain range but is separated from it on all four sides by gorges. The plateau lies approximately 130 km south of Riyadh . Features of Aliyah Plateau Aliyah Plateau features diverse geological formations...