Château de Cambiaire was built in the 14th century in the town of Saint-Étienne-Vallée-Française. It is a quadrangular building with a round tower at three of its corners and a square tower at the northwest corner. It consists of three wings around a courtyard on the west side by a battlements surrounding wall pierced by a gate. The great crenellated tower, which dungeon office, is crowned on its summit terrace of a watchtower with a roof shaped pepper shakers. This square building built shale stone mixed with white quartz is the oldest. It has three levels, the first two date from the 14th century, the last level and the spiral staircase from a raising of the late 15th century.
This tower seems more ostentatious than most military as much as the castle was never the castle of Saint-Etienne. One of the ground pavement dwelling is probably contemporary dungeon. The others are the result of rearrangements of the modern era and those of the late nineteenth century and finally repairs arising out the 1944 fire. A park of chestnut trees and cedars surrounds the castle. There is a replica of the Lourdes grotto and a chapel dating back to 1875 in neo-Gothic style.
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.