Because Finland's charming capital city enjoys a prime location along the country's southern coast, day trips from Helsinki promise an array of experiences rife with history, culture, and natural beauty. Popular day trip options include Suomenlinna island, the picturesque Old Town of Porvoo, and the historic former capital, Turku. For those eager to explore beyond Finland, a ferry journey across the Gulf of Finland leads to Estonia's vibrant capital, Tallinn, where guided tours await.