Katanpää Fortress

Katanpää Fortress stands on an island in the Archipelago Sea, controlling three navigation routes through strategic positioning at coordinates 60.61N, 21.17E.

Russian forces constructed this northernmost fortress of the Baltic Sea chain in the 1910s under Nicholas II, using prisoners from eastern Russia and Manchuria as laborers.

The fortress features four concrete cannon batteries with bunkers and multiple Russian-style wooden structures that represent early 20th-century military architecture.

Visitors reach the island exclusively by water through a 4-meter deep excursion harbor, with regular boat services operating from Uusikaupunki during summer months.

The facility transformed from an active military base with a prison between 1930-1940 into a protected cultural site where tourists explore preserved fortifications.

Location: Kustavi

GPS coordinates: 60.61222,21.17167

Latest update: July 10, 2025 21:29