Suomenlinna Sea Fortress is an ancient maritime fortress and one of Finland’s top most popular tourist destinations. It is situated at the entrance of Helsinki’s harbour. Every year more than 700,000 tourists visit this stunning fortress. The fortress is built by the Swedes, and used by the Russians. The fortress stands on six islands and in addition to its direct exposure defenses and iron cannons include the submarine. Finnish Fortress of Suomenlinna contains many things to watch like walls, cannons, tunnels, a submarine, museums, cafés, restaurants and even a brewery. If have a plan to visit Suomenlinna outside the tourist season, the city-owned ferries leave only once in every 40 minutes. And when the peak season starts, if the weather is nice there are lot of locals travel there. Fortress of Suomenlinna including in the UNESCO World Heritage Site.