Dumat al-Jandal - Credit: Wikimedia Commons
Dumat al-Jandal (, ), also known as Al-Jawf or Al-Jouf (), is an ancient city of ruins and the historical capital of the Al Jawf Province, northwestern Saudi Arabia. It is located 37 km away from Sakakah. The name Dumat al-Jandal means literally "Dumah of the Stone"; the name Al-Jawf means "depression", referring to Wadi Sirhan. The city's ancient Akkadian name was Adummatu. Dumat al-Jandal has a boundary wall which is considered a historical site. Moreover, there is an oasis that has a number of ruins. Read more on Wikipedia
Source: en.wikipedia.org