Vöyri church is the oldest still used wooden church in Finland. It was completed in 1626 and enlarged to the cruciform shape in 1777. The most well-known artefact is a medieval crucifix made probably in Lübeck between 1375 and 1400. There's also an altar made in in the late 1400's.
According archaelogical excavations there has been a medieval stone sacristy situated in the same site as the current church. There are also memorials of Civil War (1918), Winter War and Continuation War (1939-1944) located near the main entry.
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.