Trip Planner:   Europe  /  Finland  /  Uusimaa  /  Helsinki  /  Sea Fortress Suomenlinna

Sea Fortress Suomenlinna, Helsinki

4.4
#1 of 1,727 in Things to do in Finland
Castle Military Facility Must See
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
Helsinki Card BOOK WITH VIATOR FROM $56
4.5
90 reviews
Duration: 1 day
Buy tours from $56
Helsinki Sightseeing Canal Cruise BOOK WITH VIATOR FROM $28
4.5
67 reviews
Duration: 1 hour 30 minutes
Buy tours from $28
Helsinki and Suomenlinna Sightseeing Tour BOOK WITH VIATOR FROM $148
5.0
14 reviews
Duration: 5 hours
Buy tours from $148
Sea Fortress Suomenlinna Reviews
Rate this attraction
TripAdvisor Traveler Rating
TripAdvisor Traveler Rating 4.5
7,958 reviews
TripAdvisor
  • By Erganz
    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
  • By mintJYH
    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
  • By Huhojasper
    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 »
View more on TripAdvisor »
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 >
©
Temppeliaukio Church
4.2
Duration: 1​h 30​min
©
Helsinki Cathedral
4.3
Duration: 1​h 30​min
©
Uspenskin Cathedral (Uspenskin Katedraali)
4.4
Duration: 1​h 30​min
©
Senate Square
4.3
Duration: 1​h 30​min

Hidden gems in Helsinki

©
Seurasaari Island and Open-Air Museum
4.5
Duration: 1​h
©
Linnanmaki Amusement Park
3.9
Duration: 8​h
©
Market Square Kauppatori
4.1
Duration: 1​h 30​min
©
Kansallisgalleria
4.2
Duration: 1​h 30​min

Side trips from Helsinki

©
Nuuksio National Park
Espoo
4.7
Duration: 8​h
Sipoonkorven Kansallispuisto
Vantaa
5.0
Duration: 8​h
©
Sarkanniemi Theme Park
Tampere
4.1
Duration: 8​h
©
Turku Castle
Turku
4.4
Duration: 2​h

Museums in Helsinki

View all >
©
The National Museum of Finland
4.2
Duration: 1​h 30​min
©
Museum of Contemporary Art Kiasma
3.8
Duration: 1​h 30​min
©
Museum of Worker Housing (Tyovaenasuntomuseo)
4.8
Duration: 1​h 30​min
©
Helsinki University Museum (Helsingin Yliopiston Museo)
4.8
Duration: 1​h 30​min

Shopping in Helsinki

View all >
©
Old Market Hall
4.2
Duration: 1​h 30​min
©
Kamppi Shopping Centre
3.5
Duration: 1​h 30​min
©
Artisaani
5.0
Duration: 1​h 30​min
©
Hakaniemi Market
4.2
Duration: 1​h 30​min

Nearby attractions in Helsinki

©
Helsinki Central Railway Station
3.7
Duration: 30​min
Natura Viva
4.9
Duration: 2​h 30​min
©
Sibelius Monument
3.9
Duration: 1​h 30​min
©
Bicyclean Helsinki
4.9
Duration: 1​h 30​min

Featured attractions

©
Green Cap Tours
4.5
Duration: 2​h
©
Sea Fortress Suomenlinna
4.4
Duration: 1​h 30​min
©
The Esplanadi Park
4.4
Duration: 2​h 30​min
©
Kamppi Chapel of Silence
4.3
Duration: 30​min
Don't Miss a Thing. See & Do More.

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