There are many different cannons in the Coastal Cannon Museum, all of which are used for defense. It is worth visiting.
Very characteristic museum with cannons for defence of different ages, many exhibits, worth visiting.
An attraction on Suomenlinna in Helsinki is mainly to show the historical relics of Suomenlinna as a maritime military fortress, and you can learn about the history of ancient Finland.
The famous fortress on the Gulf of Finland next to the Baltic Sea serves as an important military fortress with several cannons facing the bay in addition to its heavy walls and barracks. Learn some of the ancient history of Finland.