Château de Costaérès
Château de Costaérès, Gothic Revival château on île de Costaérès, France
Château de Costaérès sits on a rocky islet near Trégastel, displaying Gothic Revival features with a circular turret and varied roof forms. Granite from the local coast was used in its construction, giving the building its distinctive character.
A Polish engineer purchased the islet in 1892 and had the château constructed shortly after, enlisting local professionals for the work. Completion came in 1896, marking a new chapter in the site's history.
The château's name reflects its Breton origins and connection to the island's past role in daily life. This ties the building to the maritime traditions that shaped the local community for generations.
The château is privately owned and situated within a protected nature reserve on the granite coast. Visitors can view the building from outside but cannot enter the grounds.
The building incorporates wood salvaged from a ship that ran aground on the coast in 1896 and was built into the structure. This unexpected detail weaves maritime fate into the château's interior.
Location: Trégastel
Inception: January 1, 1896
Architectural style: Gothic Revival
Address: Trégastel, France
GPS coordinates: 48.83528,-3.49250
Latest update: December 14, 2025 17:46
Ploumanac'h lighthouse
716 m
Oratoire de Saint-Guirec
509 m
Chapelle Saint-Guirec de Ploumanac'h
544 m
Dolmen de l'île Renote
712 m
Calvaire de la chapelle Saint-Guirec
546 m
Old Ploumanac'h lighthouse
714 m
Le Grand Traouïero tide mill
1.1 km
Plage Saint-Guirec
491 m
Le Petit Traouïero tide mill
1.1 kmOn island
376 mScenic viewpoint
640 mGrand site naturel de Ploumanac'h
543 mLa Roche Tremblante
473 mScenic viewpoint
497 m
Point de vue panoramique
973 mScenic viewpoint
390 m
Point de vue panoramique
763 m
Grève de Toul-Trez
1.2 kmPointe du Château du Diable
1.3 kmMaison du Littoral
714 mStatue des Heiligen Guirec
512 mWork of art, sculpture
1.3 kmSculpture, Work of art
1.2 kmWayside cross
1.2 kmWayside cross
469 mCommemorative plaque, memorial
464 mAllée couverte de Ty-al-Lia
708 mWater well
519 mReal people, real opinions — but not verified.
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From Ploumanac’h, we see this magnificent castle overlooking the beach and not far from the GR 34, which takes us to discover beautiful coves surrounded by pink granite rocks. A marvel!
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