Castillo de San Sebastian (Castle of San Sebastian), Cadiz

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Castillo de San Sebastian (Castle of San Sebastian), Cadiz

Castillo de San Sebastian (Castle of San Sebastian), Cadiz

The Castle of San Sebastián owns one of the city’s most dramatic backdrops. Grasping onto a rocky islet at the end of a long stone causeway, it feels like a fortress made for postcards. But before the cannons and lighthouses, legend says this was the site of the Temple of Kronos, the Greek titan who fathered some of mythology’s heavyweight gods.

Switching from BC to AD, 1457 to be exact, when a Venetian crew—recovering from the plague—built a small chapel here, probably in gratitude for surviving. The big defensive upgrade came in 1706, when a full-fledged castle was constructed to shield Cádiz’s northern flank. Built with an irregular plan, the fort absorbed layers of history, including a watchtower dating back to Muslim rule, set into its base like a hidden time capsule.

By the 19th century, engineering caught up with the waves. In 1860, a levee connected the island to the mainland, making life easier for soldiers and visitors alike. Then in 1908, architect Rafael de la Cerda added a lighthouse—no ordinary one, but Spain’s second electric-powered beacon, rising 41 meters above the sea. Where Kronos once reigned and cannons once roared, beams of light now sweep across the Atlantic.

Declared a cultural landmark in 1985, the Castle of San Sebastián has swapped battles for sightseeing. Wander through its weathered walls, climb its towers, or stand at the lighthouse and let the sea air do the rest. With sweeping views of Cádiz and the ocean that once made it a fortress of destiny, it’s history with a killer panorama—and today, the only thing it defends Cádiz from is tourists without sunscreen.

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Castillo de San Sebastian (Castle of San Sebastian) on Map

Sight Name: Castillo de San Sebastian (Castle of San Sebastian)
Sight Location: Cadiz, Spain (See walking tours in Cadiz)
Sight Type: Attraction/Landmark
Guide(s) Containing This Sight:

Walking Tours in Cadiz, Spain

Create Your Own Walk in Cadiz

Create Your Own Walk in Cadiz

Creating your own self-guided walk in Cadiz is easy and fun. Choose the city attractions that you want to see and a walk route map will be created just for you. You can even set your hotel as the start point of the walk.
Cadiz's Plazas Walking Tour

Cadiz's Plazas Walking Tour

Nicknamed “the silver cup” for the way its peninsula juts into the Atlantic, Cádiz sparkles as one of Spain’s oldest coastal gems. The Old Town is a maze of narrow streets, whitewashed façades, and balconies that seem to compete over who can grow the brightest gardens. Add in centuries of Moorish, Baroque, and Neoclassical influence, and you’ve got a city that wears its history in layers...  view more

Tour Duration: 1 Hour(s)
Travel Distance: 1.9 Km or 1.2 Miles
Cadiz's Old Fortifications Walking Tour

Cadiz's Old Fortifications Walking Tour

“Cádiz is a silver cup, surrounded by walls and kissed by the sea.” The saying isn’t just poetry—it’s urban planning. For over 3,000 years, this port city has been circling itself with stone, preparing for whoever might come sailing over the horizon. And given Cádiz’s enviable position and wealth, plenty of enemies did.

After Columbus launched voyages two and four from here,...  view more

Tour Duration: 2 Hour(s)
Travel Distance: 4.3 Km or 2.7 Miles
Cadiz Introduction Walking Tour

Cadiz Introduction Walking Tour

Cádiz isn’t just old—it’s mythologically old. Some say Hercules himself founded the city after his tenth labor, fresh from slaying a three-headed monster and stealing a herd of red cattle. Others—less into mythology, more into maritime records—say it was the Phoenicians who rolled up in black ships around 1100 BC and named it Gadir, meaning “walled stronghold.” Either way, it’s...  view more

Tour Duration: 2 Hour(s)
Travel Distance: 2.8 Km or 1.7 Miles