The Castle of Santa Àgueda is situated over an elongated plateau. The castle is accessed by an ancient Roman road. Next to the castle there was also, until recently, a chapel dedicated to Saint Agatha.
The castle was built over an ancient Roman castra by the Arabs, when Menorca was part of the Caliphate of Cordoba. The exact date of its construction is not known, but it was prior to 1232. In 1287, it became the last standpoint of resistance by the Arab inhabitants when the island was invaded by King Alfonso III of Aragon. The castle was later destroyed by Alfonso's grand-nephew King Peter IV of Aragon around 1343.
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.