Erosion repair at Länsi-Mustasaari island
Restoration of erosion-damaged terrain
in Länsi-Mustasaari will begin in summer
2025. The repaired vegetation will require
two growing seasons to recover before it
can withstand foot traffic.
The southern rampart section (batteries 3–4), marked on the map below, will be closed during the restoration and vegetation recovery period. Please do not enter the fenced-off area.
Thank you for helping us preserve this World Heritage Site!
The map for the erosion repair work site in Suomenlinna Länsi-Mustasaari island.
Map source: City of Helsinki, valuable vegetation area
The 19th-century ramparts and shoreline, built from marine sand and protected under the Building Protection Act, have suffered erosion due to both human activity and weather conditions. The restoration is essential to preserve both the area’s biodiversity and its historical structural integrity.
The ramparts are covered by a meadow with diverse and valuable plant species. Restoration is essential to preserve both biodiversity and the historical landscape.
Dianthus deltoides grows in Länsi-Mustasaari.
Erosion damage in Länsi-Mustasaari prior the restoration work.
Everyone can help preserve the cultural heritage and nature of this World Heritage Site when visiting Suomenlinna by staying on designated paths and main routes, and by following the guidance provided. Please do not pick or collect anything that belongs to the fortress or its natural surroundings.
Would you like to learn more about how to visit Suomenlinna responsibly and help protect this World Heritage Site? Explore our tips: