To the west of the Yanguas town, on the edge of the cliff, is a limestone castle that controlled the access to the Ebro valley. It is not certain when it was first built and it is possible that it was built when Yanguas received its own town charter. However, the architectonical style suggests that it was built in the 14th century.
Recent restoration works have given the castle back the dignity it deserves to be a heritage site and have made it possible to understand the defensive function of the unique columned and cobbled weapon yard. Another feature that has been restored is the tower on the north-western side.
It has a quadrangular floor plan and towers on each of the corners. On the walls, there are battlement hexes, a chemin de ronde and narrow loophole windows. There are also two gates, one on the west and the other on the east side, that gave access to the castle.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.