Helsinki is the capital of Finland. Located on the south shore of the Gulf of Finland, Helsinki is made up of a number of bays, peninsulas, and islands. Helsinki is home to Finland’s only metro line, The Helsinki Metro Line, which was started in 1982. Popular Sites of interest in Helsinki are the Helsinki Zoo, Kaivopuisto Park, Hietaniemi Beach, and Kauppatori, the city’s market square. Helsinki has an estimated population of 559,330 residents.