Along the Kings highway, which stretches from Amman to Aqaba, are various remains of Crusaders forts and outposts. Kerak & Shobak are the most important and most preserved of them. They were built a thousand years ago and represent intriguing examples of architectural and military traditions of the time.

The castle of Kerak lies at the top of a very steep hill and it is surrounded by huge walls and towers. It is a dark maze of stone, vaulted halls and passageway.

The Shobak castle perches on the side of a mountain with a grand sweep of fruit trees below. The exterior is impressive with encircling walls that are three layers thick.