From dramatic hilltop fortresses overlooking the Mediterranean to hidden mountain castles surrounded by almond groves, the Costa Blanca is one of Spain’s richest regions for medieval history. Whether you’re fascinated by ancient battles, breathtaking viewpoints, or simply looking for unforgettable places to visit, these castles reveal a different side of the Costa Blanca beyond its famous beaches.
Why Are There So Many Castles on the Costa Blanca?
When most travelers think of the Costa Blanca, they imagine golden beaches, turquoise coves, and sunny promenades. Yet for nearly a thousand years, this coastline was one of the most strategically important frontiers in Spain.
The region witnessed centuries of conflict between Muslim and Christian kingdoms during the Reconquista. Later, the Mediterranean coast became a frequent target for Barbary pirates arriving from North Africa, forcing towns to build defensive walls, watchtowers, and powerful fortresses.
Today, many of these castles still dominate the skyline exactly where they stood hundreds of years ago—on rocky peaks, mountain ridges, and coastal cliffs—offering visitors an incredible combination of history and panoramic views.
Some have been carefully restored into museums, while others remain atmospheric ruins waiting to be explored.
The 12 Best Castles in Costa Blanca
1. Santa Bárbara Castle – Alicante
If there is one castle that symbolizes the Costa Blanca, it is undoubtedly Santa Bárbara Castle.
Standing proudly on Mount Benacantil, nearly 170 meters above sea level, this enormous fortress overlooks Alicante, the marina, the beaches, and the sparkling Mediterranean.
Originally built during Islamic rule before being expanded after the Christian conquest, it has witnessed countless battles throughout Spanish history.
Today it is one of the largest medieval fortresses in Spain and the most visited castle in the province.
@mycostablanca3 Santa Barbara Castle Alicante 🇪🇦 #santabarbaracastle #alicante #spain #costablanca
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Why visit?
- Spectacular panoramic views
- Historic walls and towers
- Museum exhibitions
- Free access to many areas
- Sunset photography
2. Dénia Castle
Located in the heart of Dénia, this impressive fortress has guarded the town for over a thousand years.
Its walls reflect Roman, Islamic, and Christian influences, making it one of the most historically important castles on the Costa Blanca.
Inside you’ll discover archaeological remains, museums, beautiful gardens, and stunning views of the marina and Montgó Natural Park.
@mycostablanca3 🏰 Castell de Dénia 🇪🇦 #castelldedenia #costablanca #denia #deniacastle #spain
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Highlights
- Archaeological Museum
- Sea views
- Historic gateways
- Ancient defensive walls
3. Guadalest Castle
Few places in Spain are as breathtaking as Guadalest.
Perched dramatically on a rocky summit high above the valley, the medieval fortress seems almost impossible to reach.
Although much of the original castle was damaged by earthquakes and wars, its location remains absolutely unforgettable.
Walking through the tunnel carved into the rock before reaching the village is an experience in itself.
@mycostablanca3 El Castell de Guadalest 🏰 Nestled high in the #mountains of the Marina Baixa region in #Alicante province lies a village that looks like it leapt out of a storybook: El Castell de Guadalest, or simply Guadalest. This tiny town, perched dramatically on a rock outcrop, is surrounded by rugged cliffs, terraced hillsides, and a bright turquoise reservoir that adds to its dreamlike charm. Though home to only a few hundred residents, Guadalest draws hundreds of thousands of visitors annually — and with good reason #costablanca #spain
♬ Game Of Thrones – Violin Version – VioDance
Don’t miss
- Bell tower
- Reservoir views
- Historic old town
- Castle ruins
4. Castle of Biar
Often overlooked by international visitors, Biar Castle is one of the finest preserved Islamic fortresses in Alicante Province.
Its impressive keep dominates the surrounding countryside and offers spectacular views over vineyards and mountain landscapes.
The castle played a key role during the Reconquista and later became an important defensive stronghold.
5. Atalaya Castle – Villena
This is arguably one of Spain’s most photogenic castles.
With its massive double walls and perfectly preserved towers, Atalaya Castle looks like something straight out of a fantasy film.
Built mainly during the 12th century, it later became one of the region’s strongest Christian fortresses.
Visitors can climb its towers and enjoy panoramic views stretching for miles.
6. Castle of Sax
Perched dramatically on a narrow limestone ridge, Sax Castle dominates the skyline from almost every corner of the town.
Its isolated location made it almost impossible to attack during medieval times.
Today it remains one of the most impressive landmarks in inland Alicante.
7. Castle of Castalla
Standing above the charming old town of Castalla, this beautifully restored castle combines medieval architecture with fascinating exhibitions.
The defensive walls, palace ruins, and tower provide an excellent insight into medieval life.
It’s also one of the easiest castles to explore with families.
8. Banyeres de Mariola Castle
Surrounded by the mountains of the Sierra de Mariola Natural Park, this fortress offers a completely different atmosphere from the coastal castles.
The surrounding forests, hiking trails, and peaceful setting make it perfect for combining history with nature.
9. Castillo de Planes
Hidden among the mountains, the Castle of Planes remains one of Costa Blanca’s lesser-known treasures.
Although partially ruined, it rewards adventurous visitors with incredible scenery and a peaceful atmosphere far from the tourist crowds.
10. Moraira Castle
Unlike the large medieval fortresses, Moraira Castle was built to defend the coastline against pirate attacks.
Its compact design and location beside the beach make it one of the most photographed landmarks on the northern Costa Blanca.
It’s a perfect stop during a seaside walk.
11. Fortress of Santa Pola
More fortress than castle, this Renaissance defensive structure protected the town against pirate raids during the 16th century.
Today it houses museums, exhibitions, cultural events, and one of the most attractive historic squares in the region.
12. Tabarca Defensive Tower
Spain’s only inhabited island in the Valencian Community also has its own defensive history.
The watchtower and fortified walls on Tabarca remind visitors that even this tiny island once needed protection from pirate attacks.
Combined with crystal-clear waters and marine reserves, it offers one of the most unique historical excursions on the Costa Blanca.
Which Castle Should You Visit?
Best panoramic views
🏆 Santa Bárbara Castle
Best mountain scenery
🏆 Guadalest Castle
Best preserved medieval fortress
🏆 Atalaya Castle (Villena)
Best hidden gem
🏆 Castillo de Planes
Best family visit
🏆 Castle of Castalla
Best seaside fortress
🏆 Moraira Castle
Best photography location
🏆 Dénia Castle
Suggested Castle Road Trips
Coastal Route
Alicante → Santa Pola → Tabarca → Villajoyosa → Altea → Moraira → Dénia
Mountain Route
Alicante → Castalla → Biar → Sax → Villena → Banyeres de Mariola → Guadalest
Ultimate Costa Blanca Castle Tour
Spend three to four days exploring both the coastline and the inland mountains to experience the incredible variety of castles the region has to offer.
Tips Before You Visit
- Wear comfortable walking shoes—many castles involve steep climbs.
- Bring water, especially during summer.
- Visit early in the morning or late afternoon to avoid the heat.
- Check opening hours in advance, as smaller castles may have limited access.
- Don’t forget your camera—the views are often just as impressive as the castles themselves.
Explorer’s Checklist
How many can you tick off?
☐ Santa Bárbara Castle
☐ Dénia Castle
☐ Guadalest Castle
☐ Biar Castle
☐ Atalaya Castle (Villena)
☐ Sax Castle
☐ Castalla Castle
☐ Banyeres de Mariola Castle
☐ Castillo de Planes
☐ Moraira Castle
☐ Fortress of Santa Pola
☐ Tabarca Defensive Tower
Ready to Explore Costa Blanca’s Castles?
The Costa Blanca is far more than beaches and sunshine. Its castles tell the story of empires, pirates, kings, and centuries of Mediterranean history. From the iconic Santa Bárbara Castle rising above Alicante to hidden mountain fortresses waiting to be discovered, every stop offers a unique glimpse into the region’s fascinating past.
Whether you’re planning a weekend road trip or a longer holiday, exploring these historic fortresses is one of the best ways to experience the authentic Costa Blanca.
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