The fortified islands of Suomenlinna are an integral part of Helsinki. While they may at first seem remote, they are in fact easy to reach by a 20-minute ferry ride, using the same ticket as for buses and trams.
The fortress of Sveaborg itself – which, literally translates as “Swedish Castle” – dominates the island. It was built in the mid-18th century to bar Russian access to the Baltic. During the Swedish-Russian war of 1808-09, it fell to the Russians, who thereafter enlarged and strengthened it. In 1918, it passed into Finnish hands and was given the Finnish name of Suomenlinna (Finnish Castle).
During the 1950s and 1960s, it was handed over by the military to civilian authorities, and since then has been restored and converted for cultural and recreational use. It is now included in UNESCO’s list of world heritage monuments and is a museum, a park, and an arts venue. The area is open most of the year but hours and ferry access vary, so be sure to visit the website for the latest information.