Marid Castle
Marid Castle (or Marid balance) is a historic military fortress located in the city of Dumat al-Jandal in the Al-Jawf region of Saudi Arabia, about 50 km from Sakaka. Built in the first century AD, it was first mentioned in the third century in the context of Queen Zenobia's campaign against Dumat al-Jandal and Tayma's rebellion, when her troops weren't able to capture the fortress.