Wyher Castle is a moated castle, which lies south of the village center of Ettiswil. It was first mentioned in 1304 as the home of the Freiherr von Wediswil. After passing through several owners, around the end of the 15th century it was acquired by the Feer family. Around 1510, Petermann Feer rebuilt it into a late-Gothic castle. In 1588 it was inherited by Ludwig Pfyffer von Altishofen, whose descendants adopted the name Pfyffer von Wyher. Between 1837 and 1964 it was owned by the Hüsler family, who were local farmers.
In 1964 a fire partially destroyed the castle and it was acquired by the canton. Renovations in 1981–83 and 1992–96 repaired the damage and restored the moat. In 1996 it became a museum, housing the Josef Zihlmann collection of local religious art.
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.