National Museum of Finland: Finnish life is presented in exhibitions at the National Museum, beginning from prehistoric times to the present day. The museum’s permanent exhibitions are arranged in six distinct departments: Treasure Troves contains coins, decorations, medals, silver and weapons; the Prehistory of Finland is an enormous archaeological exhibit.

Also, the Realm presents Finnish culture and social life from the Middle Ages until the early 1900s; the Land and Its People department depicts rural life prior to industrialisation; the Past Century deals with Finland since independence; and Workshop VINTTI is an interactive exhibition, involving visitors in the country’s history and culture.
Mannerheimintie 34, FI-00101. Open: 11:00 to 20:00, Tuesday and Wednesday; 11:00 to 18:00, Thursday to Sunday.

Mannerheim Museo: this museum was once the home of the renowned CGE Mannerheim, who was born in 1867, and served for more than 30 years in the Russian Army. Mannerheim eventually led Finland to independence in a very bloody civil war, involving the death of over 30,000 Finns in a three month period. He served as a commander-in-chief and then as president of an independent Finland.
Kalliolinnantie 14, Kaivopuisto Park. Open: 11:00 to 16:00, Friday to Sunday.

Finlandia-Talo (Finlandia Hall): is one of Alvar Aalto’s most famous designs and the country’s main concert and conference venue. Built in 1971, it is home to Helsinki’s Philharmonic Orchestra (founded in 1882). The hall is an all-around experience not to be missed, both for its unusual contemporary design and its acoustics.
Mannerheimintie 13. Open: guided tours by appointment.

Ateneum Art Museum: houses the country's largest collection of Finnish art from the mid-18th century to the mid-20th century; and of western art from the latter half of the 19th century to the mid-20th. You’ll see important works from Finland's golden age, as well as works of modern masters, ranging from Albert Edelfelt to Helene Schjerfbeck. The museum hosts a wide range of activities and events, which are open to the public.
Kaivokatu 2, FI-00100. Open: 09:00 to 18:00, Tuesday and Friday; 09:00 to 20:00, Wednesday and Thursday; 11:00 to 17:00, Saturday and Sunday.