Man the guns!!
Actually these pictures are from the sea fort off Helsinki called Suomenlinna. It hasn't exactly won glory in battle: when it was attached by an Anglo-French fleet in the Crimean war it apparently had the wrong sort of guns or something.
Anyhow its a highly recommended excursion 20 minutes or so boat ride from the city. Some more pictures below, starting with the big dry dock that was meant to be full of old sail boats but wasn't: