Suomenlinna Sea Fortress Official Website

Suomenlinna is a World Heritage Site

Suomenlinna is a maritime fortress located off the coast of Helsinki. It is also a garrison town and a base for archipelago navy. The construction of the fortress began in 1748.

In 1991, the fortress was added to the UNESCO World Heritage List as a unique monument of military architecture.

Submarines in Finland - exhibition at the Suomenlinna Museum 08.05.2013

Get to know the history of submarines in waters close to Finland from the beginning of the 20th century to this day.

Guided walking tours 01.09.2012

The tour explains why the grand fortress was originally built and takes visitors to the main attractions of the island.

Les Lumières Festival 10.06.2013

18th century-style costumes, music and ball can be seen and heard in Suomenlinna during the Les Lumières Festival on 10-16 June.

More events in event calendar

With guide With kids As a group Schoolcamps Visitors with impaired mobility

King's Gate Great Courtyard The Docks

Opening hours today

Maps Ferry timetables Regulations and permissions Weather and webcam Suomenlinna Skyview summer Suomenlinna Skyview winter