Shavnabada Monastery is a medieval Georgian Orthodox monastic complex that is located upon Shavnabada Mountain. It was named in honor of St. George who, according to a local legend, wore a black cloak (shavi nabadi, hence the mountain’s name) while leading the army of the king of Georgia in one of the victorious battles of the time. The monastery of Shavnabada is known for a rare variety of wine, also called Shavnabada, made by the monks there.
St. Georg's Church was built by the Bourticsyans family in the late 19th century. The bell tower dates from 1888.
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.