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Sea Fortress Suomenlinna, Helsinki

4.4
#1 of 1,711 in Things to do in Finland
Must see · World heritage site · Castle · Military Facility
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.
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Tours to Sea Fortress Suomenlinna

Helsinki and Suomenlinna Sightseeing Tour BOOK WITH VIATOR FROM $181
5.0
Duration: 5 hours
Buy tours from $181
Helsinki Card BOOK WITH VIATOR FROM $62
4.8
Duration: 24 to 72 hours
Buy tours from $62
Money Saver: Hop-On Hop-Off Bus and Sightseeing Boat Tour BOOK WITH VIATOR FROM $51
4.5
Duration: 1 hour 30 minutes
Buy tours from $51

Sea Fortress Suomenlinna reviews

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TripAdvisor traveler rating 4.5
8,121 reviews
TripAdvisor
  • By theotime3374
    The place is really good and the photograph amator should love the place. But be careful of some rocks that are really slippy. A friend of mine nearly broke is leg! Thanks God he was lucky and just...  more »
  • By markuselbergCPH
    This was such a nice little island, and it only takes 15 minutes to go there! Must see if you are in Helsinki for a couple of days 🤏  more »
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