Naantali are some important points of interest in the city, such as the Moomin World theme park on the island of Kailo. Naantali Spa Hotel, the largest spa in the Nordic countries, and the Naantali’s medieval convent stone church. The city's popularity as a tourist venue is highlighted by the fact that the official summer residence of the President of Finland, the Kultaranta estate, is located on Luonnonmaa. The archipelago sea boat traffic is handled by S/S Ukkopekka. Old steamship cruise Naantali-Turku-Naantali. Naantali hosts an international music festival every June, and the traditional Sleepyhead Day carnival in July. In addition to
Society of Swedish Literature in Finland and Swedish culture in Finland were under threat from the Finnish side. Leading cultural figures endorsed the need for an organization to preserve and mediate the Swedish cultural heritage in Finland. At the same time they sought to strengthen the identity of the Swedish-speaking population, and its understanding of its own culture. Today SLS has over 1,100 members, with around 100 employees in Helsinki and Vaasa. The SLS archives are a rich source of knowledge about Swedish-speaking Finland, its history, traditions, literature, languages, everyday life and folk music. SLS documents contemporary society and accepts donations of cultural and historical material