
Suomenlinna Sea Fortress
A UNESCO World Heritage site and one of the most extraordinary urban experiences in northern Europe. Suomenlinna is an 18th-century sea fortress spread across six interconnected islands, a 15-minute ferry ride from Market Square. The entire outdoor area of the island complex is open to dogs on a leash โ the ramparts, the tunnels, the shoreline paths, the historic garrison buildings, and the coastal meadows. It is one of those rare places where you can spend a full day exploring with a dog and still feel you've only seen half of it. The ferry is an HSL public transport service.
๐ก Take the first or second morning ferry to explore the fortress before the afternoon crowds arrive

