The typical Galician noble fortress in Castro Caldelas with medieval origins has been splendidly conserved and restored and today functions as a library, cultural centre and exhibition venue.
The castle originally belonged to the House of the Counts of Lemos, and became part of the House of Alba in the 18th century. It was built in the 14th century as a fortress with a purely military function, and was renovated in the 16th century and converted into a palatial residence.Its floor plan is in the shape of an irregular polygon, as it adapts to the hill on which it stands. It comprises several parts or buildings, of which the rectangular keep and the clock tower are the oldest. Other surviving elements include the bailey, sections of the defensive wall, three square towers, the administrator's house, the palace (containing the library, a museum about the castle and other rooms), the interior sentry walk and the outer moat.
The location of the castle, on top of a mountain, also provides some panoramic views of the valleys below and it is easy to appreciate how impenetrable this town must have seemed to past aggressors.
You enter the castle (free of charge) through the main gateway and once inside you have unlimited access to all areas including the battlements.
References:Towering 52 meters above the sea, Bengtskär lighthouse is the tallest one in Scandinavia. The building started in in 1905 after the shipwreck of S/S Helsingfors and was completed in 1906. The lighthouse was designed by architect Florentin Granholm. On December a special petrol lantern, designed and built in Paris, was brought to Bengtskär and installed atop the tower.
German fleet bombarded Bengstkär in the First World War in 1914. Since the Gulf of Finland was heavily mined, it was not until 1919 that the surrounding seas were declared safe for shipping, that the light was lit again.
After the war the military value of Bengtskär increased as part of the defence system of independent Finland. In Second World War (1941) Soviet Union made a suprise attack to island. After a bloody battle, the small Finnish garrison emerged victorious. Intermittent repairs to the facility continued during the post-war period.