Muscettola Castle was dates from the 12th-13th centuries and was rebuilt during the Angevin period in the late 14th century. Muscettola family owned it from 1617 until mid-19th century. After them the castle came under the ownership of a wealthy local family who used it for olive oil, wine and tobacco production.
Muscettola castle is now owned by the Municipality of Leporano, who have completed much restoration in order to use it as a centre for cultural events.
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.