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
Tove Jansson her father, Viktor Jansson, was a sculptor, and her mother, Signe Hammarsten-Jansson, was a Swedish-born graphic designer and illustrator. Tove's siblings also became artists: Per Olov Jansson became a photographer and Lars Jansson an author and cartoonist. Whilst their home was in Helsinki, the family spent many of their summers in a rented cottage on an island near Borgå, 50 km east of Helsinki. Jansson studied at University College of Arts, Crafts and Design, in Stockholm in 1930–33, the Graphic School of the Finnish Academy of Fine Arts in 1933–1937, and finally at L'École d'Adrien Holy and L'École des Beaux-Arts