Oslo was a big surprise for me. After feeling not so much entertained in another Scandinavian city of Helsinki, I was afraid that Oslo may turn into the same kind of story but eventually it happened to be one of the most interesting cities I have ever been to. It is small so you can easily walk to most of the places and even in winter it has nice views under the snow so I can say only positive things about this city. Don't forget to visit one of the biggest parks in the town which is full of naked statues of men, women and children, a bit scary but art seems to have no borders so it is worth seeing it:)