Tabuk Castle is an ancient castle in Tabuk, the capital city of the Tabuk Region in northwestern Saudi Arabia which dates back to 1559.Although it is believed that castle was built about 3500 BC and mentioned in the Quran as of Aṣḥāb al-Aykah. It was constructed to protect the water station as well as for security and surveillance purposes and was one of the stations on the Levant-Medina Haj road to welcome the pilgrims.