Suomenlinna, Sea fortress on islands near Helsinki, Finland.
Six interconnected islands form a network of stone fortifications, bastions, and defensive walls that extend for several kilometers along the coastline facing the open sea.
Sweden commissioned the fortifications in 1748 under architect Augustin Ehrensvärd to defend its eastern territories. Russia captured the stronghold in 1808 during the Finnish War and held it until Finland gained independence in 1917.
Several museums operate within the fortifications, presenting Finnish military history, maritime traditions, and domestic life through permanent collections and rotating exhibitions.
Year round ferry service connects the Market Square dock to the islands with departures every 20 to 40 minutes. Visitors can explore freely, as most areas remain accessible without admission fees or guided tours.
Around 850 people live year round within the fortification boundaries, running a school, library, shops, and churches that serve both residents and the thousands of daily visitors during summer months.
Location: Helsinki
Inception: 1748
Website: https://suomenlinna.fi
GPS coordinates: 60.14361,24.98444
Latest update: December 12, 2025 18:06
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Vesikko
313 m
Military Museum of Finland
347 mKrepost Sveaborg
471 m
Suomenlinna Church
485 m
King's Gate
506 m
Ehrensvärd's grave
82 m
Noah's Ark, Suomenlinna
428 m
Military Museum's Manege
347 m
Crownwork Ehrensvärd
401 m
Adolf Erik Nordenskiöld memorial
1.9 km
Paikallismajurin talo
83 m
Ehrensvärd Museum
89 m
Helsinki Coast Guard Station
483 m
Suomenlinna Toy Museum
453 m
Mortuis
254 m
Finnish Customs Museum
172 m
Suomenlinna Museum
253 m
Harmaja Range Rear Light
482 m
Länsi-Mustasaari - Pikku Mustasaari Bridge
573 m
Ehrensvärd Museum
100 m
Pikku Mustasaari Bridge
635 m
Susisaari Bridge
224 m
Kustaanmiekka lighthouse
719 m
Kesäasunto A7, alun perin yliupseerirakennus, 1858
1.2 km
Suomenlinna beach
279 m
West Mustasaari
648 m
Alexander Battery
1.3 km
Luola, 1900 (5)
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