Ranked by strength
The 10 strongest castles in Spain
Spain’s mightiest fortresses — the strongholds built to hold against siege, ranked by military strength rather than fame. Each links through to its full history, and you can rebuild any of them to explore with AI.
- 1
Spain · Restored · prime 1350
Castle of Cardona
The Castle of Cardona is a medieval hilltop fortress in Catalonia overlooking the Cardener valley and the town of Cardona. Founded in 886, its complex includes the cylindrical Torre de la Minyona and the Lombard Romanesque Church of Sant Vicenç; the site now houses a state Parador hotel.
- 2
Spain · Restored · prime 1300
Loarre Castle
Loarre Castle is a Romanesque castle-abbey complex on a rocky outcrop near the town of Loarre in Huesca province, Aragon, Spain. Built mainly between the 11th and 13th centuries, it combines a fortified keep, curtain walls with round towers and a Romanesque chapel. The site is one of the oldest castles in Spain and today stands preserved after 20th-century restorations.
- 3
Spain · Restored · prime 1512
Castle of Coca
The Castle of Coca is a 15th–16th century Mudéjar brick castle in Coca, central Spain, notable for its hybrid Moorish–Gothic brickwork and a rectangular three-ring defensive plan with a central keep. Built beside a plain above a meander of the River Voltoya, it retains an inner enceinte, a north-side Torre del Homenaje (keep), moat and talus and today is a restored national monument open to visitors.
- 4
Spain · Partial ruin · prime 1812
Sagunto Castle
Sagunto Castle is a multi-layered hilltop fortress overlooking the town of Sagunto near Valencia, Spain. The site contains visible remains from Iberian, Roman, Islamic and later Christian and modern periods and is organised into a sequence of plazas and defensive works.
- 5
Spain · Ruin · prime 965
Castle of Gormaz
The Castle of Gormaz is a large medieval fortress on a rocky hill above the Duero in Soria, Spain, originally constructed in 965–66. It occupies a long irregular ridge with an extended curtain wall reinforced by many projecting towers and an eastern citadel. The site was later abandoned and today survives as extensive ruinous masonry walls and towers.
- 6
Spain · Restored · prime 1936
Castle of Almodóvar del Río
Castillo de Almodóvar del Río is an historical fortress of Arab Umayyad origin located in the town of Almodóvar del Río, Province of Córdoba, Spain. The present form preserves medieval towers (notably the Cuadrada, the Redonda and the Homenaje) and curtain walls after extensive restoration completed in the early 20th century.
- 7
Spain · Restored · prime 1870
Castillo de Belmonte
The Castillo de Belmonte is a 15th‑century hilltop fortress near the village of Belmonte in Cuenca, Spain, begun in 1456 for Don Juan Pacheco. After periods of abandonment it was restored and updated in the 19th century by Empress Eugenia de Montijo and later restored again; it is now a protected cultural monument open to the public.
- 8
Spain · Restored · prime 1350
Alcazaba of Málaga
The Alcazaba of Málaga is a palatial fortified citadel on a central hill in Málaga, Spain, begun in the 11th century and modified through the 14th century. It comprises two concentric walled enclosures with towers and palaces in the inner enclosure and is connected by a walled corridor to the higher Castle of Gibralfaro; remains of a Roman theatre lie on the western slope below the Alcazaba.
- 9
Spain · Restored · prime 1580
Santa Bárbara Castle
Santa Bárbara Castle is a medieval and early modern fortress that crowns Mount Benacantil above the city of Alicante, Spain. The fortification occupies three terraced enclosures along the rocky summit and contains halls, bastions, a citadel area and a Renaissance cistern, now open to the public as a historical site and museum.
- 10
Spain · Ruin · prime 1200
Calatrava la Vieja
Calatrava la Vieja is a medieval fortified site in central Spain that served as the original seat of the Order of Calatrava and a regional centre in the Guadiana valley. Now an archaeological park, the site preserves low, long stretches of masonry wall and scattered tower ruins from its medieval plan; it was abandoned in the early 15th century.