Al-Ukhaydir - Credit: Wikimedia Commons
Al-Ukhaydir (also spelled al-Akhthar, al-Akhdar, al-Akhider, Akhizer), also known as Haydar or Aqabat, is a site in the Tabuk Province in Saudi Arabia, located southeast of Tabuk. During early Ottoman rule, a fort was built at the site, part of the larger network of fortifications along the Hajj caravan route to Medina and Mecca. Read more on Wikipedia
Source: en.wikipedia.org