Suomenlinna is one of seven UNESCO World Heritage Sites in Finland and a fascinating destination to explore. There are 6 kilometers of wall, over 100 cannons, exciting tunnels, museums, guided tours, cafés and restaurants. The ferry ride itself is a fun experience, allowing you to see and photograph Helsinki from the sea. Suomenlinna attracts visitors of all ages. The fortress is easily accessed by ferry from the Helsinki Market Square all year round. Around 800 people live in Suomenlinna.