The former military island of Vallisaari is located right next to Suomenlinna and it offers deep green forests, magnificent views and interesting histories. Vallisaari was opened to public relatively recently, in 2016. In summer 2020, the island hosts Helsinki Biennial art event.
Tiny island full of history! The island of Lonna is in the vicinity of Suomenlinna, just 15 min from the Market Square. Its history concentrates around naval mines and degaussing of ships.