The Hostalric Castle, built in the 18th century, is replacing the medieval castle demolished by French troops in 1695, of which only a few traces remains. The original design of the modern fortification is the work of the military engineer Francisco de Santa Cruz. After suffering a hard siege of four months in the year 1810, the castle maintained its condition of military garrison until the beginning of 20th century. Part of the castle is converted into a restaurant.
The current fortification follow the model of military defense of Vauban and is formed by a polygonal bastion, revellines, ramps, gateways, defense towers, ammunition dumps, walls, courtyard, galleries, pit and covered walk.
The castle is accessible through a fortified road, of medieval origin. From the upper part the visitors can enjoy magnificent panoramic views of the region.