The original 13th-century castle was the headquarters of the only military order founded in the Crown of Aragon.
The 18th-century structure was built as part of a series of coastal surveillance towers commissioned by King Philip V to defend against pirate raids.
The castle layout incorporates a bastioned trace, specifically designed to withstand artillery fire.
Archaeological remains of the medieval castle are buried beneath and around the 18th-century structure.
The site served as a vital lookout point during the War of the Spanish Succession.
Castillo de Sant Jordi d'Alfama is a ruined 18th-century fortification located on the Mediterranean coast of the Gulf of Sant Jordi in Catalonia. It replaced an earlier 13th-century fortress built by the Order of St. George of Alfama, which was demolished in the early 17th century to prevent pirate occupation. The current structure is a star-shaped bastion fortification built with stone masonry and mortar. It sits within the municipality of L'Ametlla de Mar, overlooking the Cala de Sant Jordi beach. The site is largely unrestored and serves as an example of coastal military architecture designed for maritime defense. Erosion and lack of maintenance have left the structure in a dilapidated state, though the exterior walls remain largely intact.
The elevated vantage point from the path leading to the beach offers the best perspective of the castle's star-shaped footprint against the sea.
Wear sturdy, closed-toe footwear as the ground around the ruins is uneven, rocky, and potentially hazardous.
Bring sun protection and hydration, as there is no shade or visitor infrastructure at the site.
Combine the visit with a trip to the adjacent Cala de Sant Jordi beach.
Do not attempt to climb the unstable exterior walls or enter blocked-off interior sections due to structural risks.
The site is an open-air ruin and is technically accessible year-round, though access may be restricted during periods of active structural conservation work.
