Places to stay in Finland: Helsinki (5.4 million) the capital, Rovaniemi for Santa claus village. Lapland. When to go : May to September will give you a much brighter warmer experience though Lapland is a wintertime touristic experience.
Things to do : Take a sauna, Enjoy a beer in the summer sun in the many of Helsinki beer gardens and terraces. Aurora Borealis is spectacular in this northern expanse of nature. Take a husky ride in Lapland. Enjoy the Finish architecture in the villages. Get to know the native Sami.
Remember the Moomins ? Books written by the Fin Tove Jansson, and they produce good drivers, mobiles and Saunas.