The Russians fortified the island in 1915-1917 when Finland still was an autonomous part of Russia. Örö was part of Peter the Great’s naval fortress and was built as a coastal defence for the capital Saint Petersburg. Örö served as a coastal fortress for the Finnish Defence Forces from the Finnish Independence Declaration in 1917 until the end of 2014.

The Örö coastal fortress has been a military base for 100 years and conveys the history from the time of the tsar until today. In June 2015 it was finally opened up for the public.

The main attractions of the island are the Obukhovskij guns, the historic barracks and the different kinds of defence stations. The cobblestone paths from the tsarist era and the marked nature trails link the sights. 

For more information, phone +358 (0)2 52 10 111 or info(at)

You Tube video from Örö