Sheldon stone circle lies about 200m north of a minor road at Sheldon Farm. There are six large stones still standing, plus an equally large outlier close by at the east. The circle appears to be built on a raised platform, and the outlier stands at the end of a peninsula extension of this platform. The stones do not appear to be height graded, and there is no sign of a recumbent or possible flankers, but there are the remains of what could be a ring cairn in the interior.
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.