view to the artillery bay between susisaari and iso mustasaari islands of suomenlinna fortress complex

archipelago architecture artillery background baltic base bastion bay boat bridge building clouds coastline complex european finland finnish fortification fortress harbor helsinki historic island islands iso landmark landscape military mink monument multicolored museum mustasaari navy prison red rock sea ship soumenlinna submarine suomenlinna suomi susisaari sveaborg there travel vesikko view walls water