On a wooded hilltop just southeast of Rocbaron village are the ruins of Château de Saint-Sauveur. A short hike up from the village visits the ruins and gives you a magnificent view across the land.
About 10 minutes up the trail are the ruins of the ancient chapel. Really just the stone walls of the old building sitting in the trees at the edge of a small clearing. Interesting, but the real ruins are another 10-15 minutes up to the peak.
At the extreme top of the hill sit the stone ruins of 12th-century Saint Sauveur Castle. Enough of the castle walls remain on the eagles-nest site to give a Medieval feeling about it. Across the hills to the northeast, the castle ruins of Forcalqueiret are clearly visible.
Written history of the castle is rather scarce. Study of the stone defenses indicates 11th century, and possibly 10th century. The story of the castle's demise is also verbal and variable. One theory is that the castle was destroyed during local wars. Another, possibly more plausible, is that the isolated site was abandoned for the newer and more accessible castle of Forcalqueiret.
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.