finnish submarine-museum ship vesikko on the shore of artillery bay at susisaari island of suomenlinna

archipelago architecture artillery background baltic banned base bastion bay boat closeup coastline country european finland finnish fortification fortress front harbor helsinki heritage historic history island landscape last metal military mink monument multicolored museum navy nose operating part red rock sea ship shore soumenlinna submarine submarinemuseum submarines suomenlinna suomi survived susisaari sveaborg tourism vesikko walls was water white