Castle of Peña Felizana

The Castle of Peña Felizana crowns the highest point of Sos del Rey Católico, one of Aragon's best-preserved medieval towns. The fortress takes its name from the rocky spur it sits on, and it's that natural stronghold that shaped the defensive layout of the whole town below.

Why was a castle built here?

The site was first put to defensive use around the turn of the 9th and 10th centuries, when Sancho Abarca resettled the area. The castle as it stands today dates to roughly 970, built under Sancho Garcés II. For the next two centuries, from the 10th through the 12th, it served as a frontier outpost on the border between Christian and Muslim territory — which explains its stark, purely military design rather than any decorative flourishes.

Its political history was turbulent. During the first half of the 11th century, under Sancho el Mayor, it belonged to the Kingdom of Navarre. Later King Ramiro I brought it into the Kingdom of Aragon and turned it into a stronghold aimed squarely at Navarre. Ramiro II "the Monk," another Aragonese king, is credited with raising the tower that still dominates the walls today.

What will you actually see?

The castle is a compact, walled complex with an irregular layout — the result of centuries of rebuilding along a narrow rocky ridge. Sections of the perimeter wall survive, along with a circular tower pierced with arrow slits, typical of border fortifications from that era. At the center stands the main draw: a square tower six meters on each side, built of dressed ashlar stone, its restored crenellated top now the most photographed feature of Sos del Rey Católico.

The town itself stretches along a rocky ridge with two distinct high points — one of them is Peña Felizana, which gave the castle its name. Thanks to that elevated position, the castle walls open up wide views over the Onsella river valley and the surrounding Aragonese countryside.

How do you get there, and when should you go?

The castle sits at the highest point of Sos del Rey Católico, in Zaragoza province, and is reached on foot from the town center — a walk of roughly ten to fifteen minutes up steep, cobbled streets. Spring and autumn are the best times to visit: temperatures stay mild and the light flatters the stone. In summer, the exposed hilltop heats up quickly around midday, so plan for morning or evening.

It's worth pairing the castle with the rest of the old town. Sos del Rey Católico is the birthplace of Ferdinand II of Aragon, and the whole historic center is protected as a heritage ensemble.

Frequently asked questions

Is there an entrance fee for the castle? No — the castle grounds and walls are open public space on the hilltop, accessible on foot without a ticket.

How much time should I set aside? A relaxed walk around the walls and tower takes about 30–45 minutes, including time for photos of the panorama.

Is the castle legally protected? Yes, it is listed as a Bien de Interés Cultural (Property of Cultural Interest) under Aragon's cultural heritage law.

Is there parking nearby? Because the old town's streets are narrow and steep, the easiest option is to park in the lower lots at the edge of Sos del Rey Católico and walk up from there.