Background

Suomenlinna Sea Fortress: A UNESCO World Heritage Site

Explore Suomenlinna: A historic sea fortress and UNESCO World Heritage Site just a short ferry ride from Helsinki's Market Square.

4.6

Suomenlinna is a sea fortress on a group of islands near Helsinki, Finland. Built in the 18th century, it has served Sweden, Russia, and Finland. Today, it's a UNESCO site with museums, tunnels, and parks, offering a glimpse into military history and island life.

A brief summary to Suomenlinna Sea Fortress

Local tips

  • Wear comfortable shoes, as you'll be doing a lot of walking on cobblestone streets and uneven terrain.
  • Bring a picnic to enjoy in one of the fortress's scenic parks or on the rocky coastline.
  • Check the opening hours of museums and restaurants, as some operate seasonally.
  • Purchase a Helsinki Card for access to Suomenlinna and other attractions in the city.
  • Download the Suomenlinna Audio Guide to explore the fortress independently.
widget icon

Getting There

  • Public Transport

    The primary way to reach Suomenlinna is by ferry from Helsinki's Market Square. Ferries operated by Helsinki Regional Transport (HSL) depart frequently throughout the year. The journey takes approximately 15-20 minutes. A single ticket costs around €3 and is valid for zones A or AB. Tickets must be purchased before boarding via the HSL app or ticket machines at the pier.

  • Walking

    From Helsinki city center, walk towards the South Harbour (Eteläsatama) and Market Square (Kauppatori). The Market Square is located opposite Helsinki City Hall. Follow the signs to the ferry terminal. The walk from Helsinki Central Railway Station is approximately one kilometer and takes about 20 minutes.

Unlock the Best of Suomenlinna Sea Fortress

Buy tickets

    No tickets available

Book tours with entry

    No tours available

Book tours without entry

    No tours available

Discover more about Suomenlinna Sea Fortress

Suomenlinna, a UNESCO World Heritage site, is a sprawling sea fortress built on a cluster of islands just off the coast of Helsinki. This unique historical monument was constructed in 1748 when Finland was part of Sweden. Originally named Sveaborg ('Fortress of Sweden'), it was intended to defend against Russia. Over the centuries, the fortress has been under the rule of three different states: the Kingdom of Sweden, the Russian Empire, and finally, the Republic of Finland. Suomenlinna showcases the evolution of military architecture, adapting Vauban's theories to the unique island landscape. The fortress consists of six kilometers of walls, approximately 100 cannons, tunnels, and parks. Visitors can explore the fortifications, museums, and the only remaining Finnish submarine, Vesikko. After Finland gained independence in 1917, the fortress was renamed Suomenlinna ('Castle of Finland'). The fortress served as a garrison and harbor and participated in Helsinki's air defense during World War II. In 1973, it was converted for civilian use and is now home to about 800 residents. Today, Suomenlinna offers a blend of history, culture, and natural beauty, making it a popular destination.

Popular Experiences near Suomenlinna Sea Fortress

Popular Hotels near Suomenlinna Sea Fortress

Select Currency