50 Photos of Suomenlinna, a World Heritage Fortress in Finland

A UNESCO World Heritage site, Suomenlinna is an inhabited sea fortress built on six islands (Kustaanmiekka, Susisaari, Iso-Mustasaari, Pikku-Mustasaari, Lansi-Mustasaari and Langoren) and which now form part of the city of Helsinki, the capital of Finland. The pictures speak for themselves.