The Cellar of the Sea – a dive beneath the Baltic Sea’s surface
5 March 2025 – 16 January 2026
Suomenlinna Museum, Suomenlinna C74, Helsinki
For opening hours and admission fees, please visit the Suomenlinna Museum website.
Take a dive into the wondrously diverse depths of the Baltic Sea. The Cellar of the Sea takes you beneath the surface to discover the secrets of the Baltic Sea – its ecosystems, unique history and valuable cultural heritage.
The exhibition provides insights into various regions of the Baltic Sea, its fascinating key species and environmental threats caused by human activities. Study the evolution of diving equipment and learn how shipwrecks reveal stories buried in the bottom of the sea.
The exhibition offers a versatile information package on the Baltic Sea and a chance to admire the works of Finland’s most prestigious underwater and shipwreck photographers, Pekka Tuuri and Jouni Polkko, as well as archipelago photographer Raimo Sundelin.
Welcome to an expedition that will deepen your understanding of one of the world’s most special marine regions and show you the importance of conserving it.
The Governing Body of Suomenlinna has supported the production of the exhibition.
Teacher, bring your class for a visit to the Baltic Sea
The Cellar of the Sea exhibition is ideal to support a Baltic Sea-themed lesson, especially for lower and upper secondary students. School groups (ages 7–18) are welcome to visit the museum free of charge under a teacher’s supervision. Please provide advance notice of your group’s visit. Read more here.
Visit online exhibitions
Dive into shipwrecks from World War I, traverse the mythical maps of the North or spot Baltic Sea birds. Welcome to visit our online exhibitions free of charge!