of Kailo, and Naantali’s medieval convent stone church. The area also includes the official summer residence of the President of Finland, the Kultaranta estate which 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. Culture Every July 27, Naantali celebrates the National Sleepy Head Day (; ). The old tradition is to throw a chosen "sleepy head", an usually Finnish celebrity, in the sea from the city's port at 7 a.m. The identity of the sleeper is kept secret until the event. People who are chosen have usually done something to the benefit of the city. Other industries In addition to tourism, the city's main industries are electricity production, oil refining, manufacturing, and services. The Port of Naantali is the third largest in Finland in terms of goods traffic, and the city is home to a power plant and an oil refinery owned by the government-controlled company Fortum and Neste. International relations Twin towns — Sister cities Naantali is twinned with: Vadstena, Sweden Nordfyn, Denmark Svelvik, Norway Vesturbyggð, Iceland Puck, Poland Kirovsk, Russia Notable people Kaarlo Heinonen (1878–1944) Teppo Rastio (born 1934) Pekka Siitoin (1944–2003) Keijo Virtanen (born 1945) Ilkka Kantola (born 1957) Lauri Heikkilä (born 1957) Jukka Vilander (born 1962) Cristal Snow (born 1975) Gallery See also Ekenäs, Finland References External links Town of Naantali – Official website Naantali Tourist Information Ltd Naantali Spa Hotel Moomin World VG-62 Cities and towns in Finland Populated coastal places in Finland Seaside resorts in Finland Medieval Finnish towns Grand Duchy of Finland Populated places established in the 1440s Port cities and towns of the Baltic Sea