suomenlinna (sveaborg) - inhabited sea fortress in helsinki

sea coast bay harbor vehicle reflection horizon waterway river shore dock skyline marina dusk ocean water port suomenlinna sveaborg inhabited fortress helsinki built six islands forms city helsinki finland water travel landscape construction building autumn sea architecture blue old fall castle military urban island tourism unesco coastline coast fortification capital fortress cannon defense ancient gun outdoor golden navy baltic landmark finnish history northern suomenlinna heritage sveaborg exterior famous inhabited iso-mustasaari kustaanmiekka langoren lansi-mustasaari pikku-mustasaari suomi susisaari viapori