As-Safa, also known as Tulul al-Safa, Arabic for Al-Safa hills, is a hilly region which lies in southern Syria, north-east of Jabal al-Druze volcanic plateau. It consists of a basaltic lava field of volcanic origin, covering an area of 220 square kilometres, and contains at least 38 cinder cones. This volcanic field lies within the northern part of the massive alkaline Harrat Ash Shamah volcanic field that extends from southern Syria, through eastern Jordan to Saudi Arabia. The region is extremely scarce in water.