Sea Fortress Suomenlinna, Helsinki

4.4
#1 of 1,727 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
map
© OpenMapTiles © OpenStreetMap contributors
Tours to Sea Fortress Suomenlinna
Sea Fortress Suomenlinna Reviews
Rate this attraction
TripAdvisor Traveler Rating
TripAdvisor Traveler Rating 4.5
7,958 reviews
TripAdvisor
  • Nice to visit with a picnic or swim, restaurant near the beach is top notch. On a windy day, the wind in the swampless.
    View original
  • Because of the fortress, there are air-raid shelters and guns in various places. There was a pretty good gun, and because the person was sparse, the photograph was able to be taken slowly. It is a place where it is good to spend a relaxing time with packed lunch etc.
    View original
  • We went on a visit when weather was poor. It gave a really good insight into Finland history. There was a good military history museum but we were reluctant to to pay 8 euros each to enter another mus...  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.

Popular things to do in Helsinki

View all >
4.2
Duration: 1​h 30​min
4.3
Duration: 1​h 30​min
4.4
Duration: 1​h 30​min
4.3
Duration: 1​h 30​min

Hidden gems in Helsinki

3.9
Duration: 8​h
4.1
Duration: 1​h 30​min
4.2
Duration: 1​h 30​min

Side trips from Helsinki

4.7
Duration: 8​h
5.0
Duration: 8​h
4.1
Duration: 8​h
4.4
Duration: 2​h

Museums in Helsinki

View all >
4.2
Duration: 1​h 30​min
3.8
Duration: 1​h 30​min
4.8
Duration: 1​h 30​min

Shopping in Helsinki

View all >
4.2
Duration: 1​h 30​min
3.5
Duration: 1​h 30​min
5.0
Duration: 1​h 30​min
4.2
Duration: 1​h 30​min

Nearby attractions in Helsinki

3.7
Duration: 30​min
4.9
Duration: 2​h 30​min
3.9
Duration: 1​h 30​min
4.9
Duration: 1​h 30​min
4.5
Duration: 2​h
4.4
Duration: 1​h 30​min
4.4
Duration: 2​h 30​min
4.3
Duration: 30​min

Plans to Sea Fortress Suomenlinna by other users

7 days in Helsinki Region BY A USER FROM FRANCE December, outdoors, wildlife, popular & hidden gems PREFERENCES: December, outdoors, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Medium 19 days in Finland BY A USER FROM INDIA June, teens, extra slow, popular & hidden gems PREFERENCES: June, teens ATTRACTION STYLE: Popular & hidden gems PACE: Extra slow 16 days in Finland BY A USER FROM INDIA June, teens, culture, outdoors, relaxing, wildlife, slow & easy, popular & hidden gems PREFERENCES: June, teens, culture, outdoors, relaxing, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Slow & easy 4 days in Finland BY A USER FROM THAILAND November, popular sights PREFERENCES: November ATTRACTION STYLE: Popular sights PACE: Medium 12 days in Europe BY A USER FROM SINGAPORE July, popular sights PREFERENCES: July ATTRACTION STYLE: Popular sights PACE: Medium 8 days in Helsinki BY A USER FROM POLAND January, popular sights PREFERENCES: January ATTRACTION STYLE: Popular sights PACE: Medium 14 days in Finland BY A USER FROM INDIA March, popular sights PREFERENCES: March ATTRACTION STYLE: Popular sights PACE: Medium 6 days in Helsinki & Rovaniemi BY A USER FROM GERMANY June, popular sights PREFERENCES: June ATTRACTION STYLE: Popular sights PACE: Medium 6 days in Helsinki, Rauma & Tampere BY A USER FROM ITALY December, popular sights PREFERENCES: December ATTRACTION STYLE: Popular sights PACE: Medium 11 days in Helsinki & Vaasa BY A USER FROM LATVIA June, outdoors, beaches, wildlife, popular & hidden gems PREFERENCES: June, outdoors, beaches, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Medium 16 days in Finland BY A USER FROM INDIA June, teens, culture, outdoors, relaxing, historic sites, wildlife, popular & hidden gems PREFERENCES: June, teens, culture, outdoors, relaxing, historic sites, wildlife ATTRACTION STYLE: Popular & hidden gems PACE: Medium 15 days in Finland BY A USER FROM INDIA June, teens, popular sights PREFERENCES: June, teens ATTRACTION STYLE: Popular sights PACE: Medium
View more plans