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
Swedish-speaking population of Finland and Finnish-speakers are nowadays very common. According to a study commissioned by the Swedish Assembly of Finland in 2005, 48.5% of all families with children where at least one of the parents was Swedish-speaking were bilingual in the sense of one parent being Swedish- and the other Finnish-speaking (only families living in those municipalities where Swedish was at least a co-official language were included in this study). 67.7% of the children from these bilingual families were registered as Swedish-speaking. The proportion of those who attended schools where Swedish was the language of instruction was even higher. The Finnish authorities classify