World by City

Castles & palaces

Suomenlinna

Open in Maps
Suomenlinna

Overview

Suomenlinna is a sea fortress spread across six islands off the coast of Helsinki. Built during the 18th century as a naval defense base, it attracts visitors looking to walk among preserved stone ramparts, historic artillery, tunnel networks, and open coastal views.

Getting There

Ferries depart regularly from the Market Square in Helsinki city centre. The boat ride takes roughly 15 to 20 minutes each way.

Time to Allow

Plan for 2 to 4 hours to walk the main routes across the islands. Allow half a day if exploring multiple indoor exhibitions or taking a slower pace.

When to Go

Summer brings the mildest weather, though paths become crowded during sunny weekends and mid-afternoon. Spring and autumn offer fewer visitors. Winter visits require warm clothing and sturdy shoes due to icy paths and cold coastal winds.

Nearby Attractions

These sights can be combined with a trip to the fortress:

  • Vesikko (0.3km): A restored submarine located on the islands.
  • Military Museum of Finland (0.4km): Exhibits covering Finnish defense history.
  • Vallisaari (1.2km): A neighboring island with nature paths and historic defense ruins.
  • Kaivopuisto (2.1km): A mainland coastal park facing the archipelago.

Updated September 8, 2026 · Edited by the World by City editors

Tickets & tours

Admission prices and opening hours change often, so we don't list them here. Check what's on sale and at what price below — booking ahead can cut the queue at some places.

GetYourGuide GetYourGuide 클룩 Klook Tiqets Tiqets KKday KKday WeGoTrip WeGoTrip Official site

This place may not appear in the results — some sites are free to enter or sell tickets only at the gate.

Stays near Suomenlinna

Sorted by distance, walkable ones first. Distances are straight-line.

Map and place data © OpenStreetMap contributors

Suomenlinna Nearby stays

Check prices and availability on the booking sites.

Pick your dates — we'll search Helsinki hotels for you

Choose dates and guests, and the buttons below will open search results with your criteria. Prices differ between sites, so compare before you book.

View on Compare sites 부킹닷컴 View on Booking.com 호텔스닷컴 View on Hotels.com

Hotel membership

Staying at Accor hotels often? ALL Accor+ Explorer

A paid annual membership. It includes two free nights a year across Asia-Pacific, 30% off dining and 15% off drinks, and 15% off stays at more than 4,500 hotels worldwide.

Explore the membership

Itineraries including this place

2 nights, 3 days

Helsinki 3-Day Itinerary (2 Nights)

A 3-day route through Helsinki grouped by daily travel distance for optimal sightseeing.

3 nights, 4 days

Helsinki 4-Day Itinerary (3 Nights)

A 4-day route through Helsinki grouped by daily travel distance for optimal sightseeing.

Good to visit alongside

Vesikko

Museums & galleries

Vesikko

Vesikko is a submarine once operated by the Finnish Navy, which saw action in the Winter War and the Continuation War and sank a Soviet merchant ship. It's now on display in Helsinki, where visitors can explore its interior.

0.3 km away
Military Museum of Finland

Museums & galleries

Military Museum of Finland

The War Museum is located on the island fortress of Suomenlinna, a UNESCO World Heritage Site, and showcases Finland's military history alongside its modern defense. Visitors can also explore the outdoor training grounds and the submarine Vesikko on a nearby island.

0.4 km away
Vallisaari

Nature

Vallisaari

Vallisaari is an island off the coast of Helsinki, located between Suomenlinna and Santahamina. It's a great place to take a boat over and enjoy a quiet island landscape.

1.2 km away
Kaivopuisto

Shopping & districts

Kaivopuisto

Kaivopuisto is one of the oldest and most famous parks in central Helsinki. Surrounded by a quiet residential area, it's a lovely spot for a relaxing walk.

2.1 km away
Roman Catholic Diocese of Helsinki

Temples & religious sites

Roman Catholic Diocese of Helsinki

A diocese overseeing Roman Catholics throughout Finland, with eight parishes including one in Oulu in the north. Its current bishop is the first Finnish-born bishop of the Catholic Church in Finland since it was reestablished after the Reformation.

2.4 km away
Pyhän Henrikin katedraali

Temples & religious sites

Pyhän Henrikin katedraali

This Roman Catholic cathedral in Helsinki is dedicated to Bishop Henry of Turku, a 12th-century bishop. It serves as the seat of Finland's Catholic diocese and has the country's largest congregation.

2.4 km away