Montreal, or Qal'at ash-Shawbak in Arabic, is a castle built by the Crusaders and expanded by the Mamluks, on the eastern side of the Arabah Valley, perched on the side of a rocky, conical mountain, looking out over fruit orchards below. The ruins are located next to the modern town of Shoubak in Jordan.

Shoubak is a municipality that lies at the northwestern edge of the Ma'an Governorate in Jordan. It had a population of 19,297. At one of the highest elevations above sea level in Jordan, this municipality is famous for apple and fruit farms. The Crusader castle Montreal is located in Shoubak.