Built in the second half of the 18th century by Sweden on a group of islands located at the entrance of Helsinki's harbour, this fortress is an especially interesting example of European military architecture of the time.
There is no entrance gate timetable for the fortress itself. Public tours run weekly year-round and daily in summer; museums vary by season.
Free
No booking needed
Suomenlinna, or Sveaborg, is a sea fortress composed of eight islands, of which six have been fortified. Located about four kilometres (2.5 mi) southeast of the city center of Helsinki, Finland, Suomenlinna is a popular destination for both tourists and locals, who enjoy it as a picturesque picnic site.
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