Mola Castle was built during the Arabian period in the 9th century and enlarged in the 10th century by Almohad reign. It was restored by the Kingdom of Valencia in the 14th century. Today there are impressive ruins and the Gaudi-inspired church of Santuario Santa Magdalena.
The church was designed by an engineer from Novelda, José Sala Sala. The work was started in 1918, but was first completed in 1946. It is inspired by the famous La Familia Sagrada, Gaudi's masterpiece in Barcelona, but has several characteristics that make it unique.
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.