Ramlat al-Sab'atayn
The Ramlat al-Sab'atayn is a region of desert in north-central Yemen. It comprises mainly transverse and seif dunes and covers an area of about, roughly. The area includes part of what was known to medieval Arab geographers as the Ṣayhad. It extends from al-Khawr to the edge of the Rub' al-Khālī or Empty Quarter. It includes the Yemeni muhafazahs of al-Jawf, Ma'rib and Shabwa.
