Saudi Arabia, Jouf, Domat al-Jandal. Standing alongside the ruined mud-brik remains of old Domat al-Jandal

- Image ID: C4ATNA
John Warburton-Lee Photography / Alamy Stock Photo
Image ID: C4ATNA
Saudi Arabia, Jouf, Domat al-Jandal. Standing alongside the ruined mud-brik remains of old Domat al-Jandal, the Mosque of Omar is believed to have been founded by Omar bin al-Khattab (the second caliph) and is one of the county's oldest surviving mosques.