Sea Fortress Suomenlinna, Helsinki

#1 of 1,666 in Things to do in Finland
Visit World Heritage Site Sea Fortress Suomenlinna to see a sea fortress built on a collection of six islands. This ruggedly beautiful spot is a favorite among both locals and tourists. The fortress was built in 1748 and inhabited by Swedes and Russians until 1918, when it became a part of independent Finland. View the impressive fortified structure, constructed by the Swedish crown to withstand attacks from 18th-century Russia (who eventually overtook the islands in 1808). Nowadays the site supports a town with civilian inhabitants and draws visitors from the mainland of Finland. For travelers who use our online itinerary creator, Helsinki holidays become easier to arrange, with trips to the Sea Fortress Suomenlinna and other attractions mapped out and timetabled.
Improve this listing »
Create an itinerary including Sea Fortress Suomenlinna
© OpenMapTiles © OpenStreetMap contributors
Sea Fortress Suomenlinna Reviews
Rate this attraction
TripAdvisor Traveler Rating
TripAdvisor Traveler Rating 4.0
7,230 reviews
  • You can feel the History the moment you set foot on the Island and the further you walk into the center and outskirts of the island you can definately feel the tension from the aggression (war/invasio...  more »
  • A wonderful place where you can wander among the fortresses on 4 Islands. Part of the territory-acting military unit, and a part of the prison, so it's not everywhere you go. But where will turn out-everything is just stunning. And sea views are worthy of postcards.
    View original
  • A place you should see while visiting Helsinki. Even the ferry trip to the islands is something to enjoy. The Suomenlinna is full of (mostly military) history but also with Pokemon Go things. Interest...  more »
Places to stay near Sea Fortress Suomenlinna

Plan your trip to Helsinki

  • Get a personalized plan

    A complete day-by-day itinerary
    based on your preferences
  • Customize it

    Refine your plan. We'll find the
    best routes and schedules
  • Book it

    Choose from the best hotels
    and activities. Up to 50% off
  • Manage it

    Everything in one place.
    Everyone on the same page.

Plans to Sea Fortress Suomenlinna by other users

View more plans