Wabar craters
The Wabar craters are impact craters located in Saudi Arabia first brought to the attention of Western scholars by British Arabist, explorer, writer and Colonial Office intelligence officer St John Philby, who discovered them while searching for the legendary city of Ubar in Arabia's Rub' al Khali ("Empty Quarter") in 1932. == The expeditions == === 1932 Philby === The vast desert wasteland of southern Saudi Arabia known as the Empty Quarter, or Rub' al Khali in Arabic, is one of the most desolate places on Earth.