From the Promontory (711m) overlooking the Ouvèze, The Ubrieux castle dominated the natural lock of the Gorges of Ubrieux. This stronghold, built in 1240, was one of the keys of the defense system of Boxwood, then capital of the Barony of Mévouillon. The strategic position of this fort was partly on its perched position but also on the fact that it was on the edge of anotherBaronnie : The one of Montauban. It remains today only the base of the fortifications of the fort, destroyed in 1590.