TURKU CATHEDRAL

Turku Cathedral is Finland´s national shrine. The church is dedicated to the Virgin Mary and was inaugurated in the year 1300. At the same time, the first bishop of Finland, St. Henrik, was named the patron saint of the church. The Cathedral is the final resting place of bishops and warlords and even one queen. The cathedral is regarded as one of the major records of Finnish architectural history.
The Cathedral Museum on the southern gallery takes the visitor back in time to the 14th century. The museum´s exhibits cast light on the Cathedral´s history and ecclesiastical life.
http://www.turunsrk.fi/portal/turun_tuomiokirkko/english/
Tuomiokirkkotori 20

The largest castle in Finland and one of country’s most magnificent national treasures. The history of Turku Castle dates back to the 1280s and it is one of the most splendid examples of Finland´s national heritage. The castle´s heyday was in the 16th century, during the rule of Duke Johan and Katarina Jagellonica.
http://www.turku.fi/museo/english/castle.htm
Linnankatu 80

Located in the heart of the city, the Market Square offers a colourful and varied range of high quality products. Here you'll meet locals and visitors alike enjoying the market atmosphere that changes from season to season, morning till evening. Nearby are buildings of interest, including the Orthodox church, the Swedish Theatre, an old apothecary and bakery, and the quaint market hall.

THE ISLAND OF RUISSALO AND BOTANICAL GARDENS

The island of Ruissalo, approx. 8 km outside the city centre, is the home of many beautiful villas and its parkland used to serve as royal hunting grounds. The Ruissalo villa area contains some 50 villas of cultural, architectual and historic value. The other half of the island is public outdoor area with beautiful walkingtrails and restaurants. 
Located on the island are the Botanical Gardens of the University of Turku, a scientific research centre and a colourful display window on the world of flora in Turku region.

Between sightseeing and visiting the other tourist attractions, take a delightful walk along the riverbank an enjoy the river boats that rest on the Aura river. Pick a boat of your choice, sit down and relax and have a drink or enjoy dinner onboard. The city's famous ferry Föri takes you from one side of the river to the other - free of charge. Frequent daily traffic from early morning until midnight all year round.

THE ARCHIPELAGO

Each year 300 000 tourists find their way to the world's largest archipelago. The fifteen vessels and the same number of routes cover the western area stretching from Hanko to Uusikaupunki and from Turku to Utö. There is a ferry route to every inhabited island that is not accessible by road. Each year more than 290 000 passengers discover the beautiful Turku archipelago. The archipelago is easily accessible by bus, car or boat. The Archipelago Trail, with its twelve bridges and nine ferries, offers many things to see apart from beautiful island landscapes. There are attractive guest marinas, local history museums and comfortable accommodations from B & B to hotels and summer cottages.