Original: Some notable islands in Helsinki include Seurasaari, Lauttasaari and Korkeasaari which is also the country's biggest zoo as well as the fortress island of Suomenlinna (Sveaborg) and the military island of Santahamina.
Simplified: Some famous islands include Seurasaari, Lauttasaari and Korkeasaari - which is also the country's biggest zoo - as well as the fortress island of Suomenlinna (Sveaborg).