Helsinki is the capital and largest city of Finland. It is in the region of Uusimaa, in southern Finland, on the shore of the Gulf of Finland., making it the most populous municipality and urban area in Finland.
Its central avenue, Mannerheimintie, is flanked by institutions including the National Museum, tracing Finnish history from the Stone Age to the present. Also on Mannerheimintie are the imposing Parliament House and Kiasma, a contemporary art museum. Ornate red-brick Uspenski Cathedral overlooks a harbor.