It is the most charming place of Helsinki. Suomenlinna is an ancient citadel located on an island off the Bay of Helsinki. From the port of Helsinki you can take several ferry boats all which leave every half hour. When you are there, you can enjoy a pleasant walk in the citadel and its surroundings. You can see and touch the ancient artillery guns that protected the bay. It reminded me a lot Hobbiton, with its small houses and small stores in the green hills.