The historic Suomenlinna fortress is known as the ‘Castle of Finland”. Visiting the castle is one of the top things to do while visiting Helsinki, Finland.

About Suomenlinna Castle

Suomenlinna is a designated UNESCO World Heritage Site. The fortress was created in the 1700s by Swedish military officer and architect Augustin Ehrensvärd. Ehrensvärd was also responsible for creating the Swedish archipelago fleet. There are six museums located on the Suomenlinna site.

If you plan to visit several museums during your stay in Finland, a Museum Card is available.

Top things to do at Suomenlinna fortress ‘Castle of Finland”

1. Go on a walking tour of the Castle of Finland

The 1.5 km long walking tour is along the ‘Blue Route’. It begins at the Visitor’s Centre in the stone building with a vaulted tin roof called the Jetty Barracks.

The Jetty Barracks was built by the Russians around 1868. During peacetime, it could hold 250 soldiers. It now serves as a visitor’s centre, cafe, artist gallery, and Suomenlinna Brewery and Cafe.

One of the top things to do in Helsinki is to visit the "Castle of Finland" Suomenlinna. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Lentokuva Vallas Oy©

One of the top things to do in Helsinki is to visit the “Castle of Finland” Suomenlinna. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Lentokuva Vallas Oy©

2. Take in the views from the Kings Gate

Stand in the framed marble-stoned Kings Gate to admire sweeping harbour views. Built around 1753, the gate is the grand entrance to the fortress.

A double draw bridge and stairs made from Swedish limestone were added in the 1770s.

One of the top things to do in Helsinki is to visit the "Castle of Finland" Suomenlina. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Yrjö Tuunanen©

The Kings Gate at the “Castle of Finland” Suomenlinna. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Yrjö Tuunanen©

3. Visit the Great Courtyard Tomb

The tomb of architect Augustin Ehrensvärd is found in the Great Courtyard. After Ehrensvärd death in 1772, King Gustav III of Sweden designed his tomb with Augustin’s son Carl August Ehrensvärd and Johan Tobias Sergel. The monument was completed in the early 1880s. The courtyard was badly damaged in 1885 during the Crimean War.

The historic Suomenlinna fortress is known as the 'Castle of Finland". One of the top things to do in Helsinki is to Visit the "Castle of Finland" Suomenlina. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Dorit Salutskij©

One of the top things to do in Helsinki is to visit the “Castle of Finland” Suomenlina. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Dorit Salutskij©

One of the top things to do in Helsinki is to Visit the "Castle of Finland" Suomenlina. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Dorit Salutskij©The grave site of Augustin Ehrensvärd, a Swedish military officer, military architect, artist, and creator of the fortress and the Swedish archipelago fleet. Suomenlinna is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Dorit Salutskij©

4. See the Suomenlinna Cannons

Investigate the historic cannons of Suomenlinna Fortress.

One of the top things to do in Helsinki is to visit the "Castle of Finland" Suomenlina. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Dorit Salutskij©

The cannons look out at the harbour of the “Castle of Finland”. It is a designated UNESCO World Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Dorit Salutskij©

5. Ehrensvärd Museum

Find out about the history of the Swedish era of the fortress at the Ehrensvärd Museum.

6. The Toy Musuem

Explore the Toy Museum’s antique dolls and teddy bears from the 1800s to the 1960s. It also has a special collection of wartime toys.

7. Vesikko Submarine Museum

Climb aboard the restored Finnish Vesikko Submarine Museum, which opened in 1978.

8. Suomenlinna Museum

Discover more about the history of the fortress at the Suomenlinna Museum.

9. Military Museum

Learn about the Finnish defence forces and its history spanning more than 270 years at the Military Museum’s Manege.

10. Customs Museum

Gather interesting facts about Finland’s history of customs and smuggling at the Customs Museum.

Getting to Suomenlinna

You can take a 20-minute ferry service from Market Square in Helsinki, Finland. The fortress does not charge an entrance fee, but each of the six museums on the Suomenlinna site does.

One of the top things to do in Helsinki is to visit the "Castle of Finland" Suomenlina. It is a designated UNESCO world Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Arttu Kokkonen©

One of the top things to do in Helsinki is to visit the “Castle of Finland”. It is a designated UNESCO world Heritage Site. Photo archives of the Governing Body of Suomenlinna, Photographer Arttu Kokkonen©

Quick Facts

  • Sweden built and ruled the fortress from 1748-1808.
  • The fort was originally called Viapori.
  • Russia seized the fort after the Russo-Swedish War and ruled here from 1808-1918.

  • Finland gained its independence from Russia in 1917 at the time of the Russian Revolution.
  • Suomenlinna officially transferred to Finland in 1918 after the Finish Civil War.
  • Suomenlinna became a designated UNESCO World Heritage Site in 1991.

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