The Fort de Tournoux is a fortification complex in the Ubaye Valley in the French Alps. It was built between 1843 and the early 20th century to defend France against invasion from Italy and Savoy. It was described as the 'Military Versailles of the 19th century,' resembling a Tibetan monastery on the mountainside above the Ubaye. The fort is actually an ensemble of fortifications, including some 'batteries' that rival the main fort in size and power.
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.