Oslo is a capital with a fjord at the bottom of its streets and a forest at the end of its metro lines. It sits at the head of the Oslofjord, with forest, Marka, wrapped around the city so close that the metro takes you from the center to the ski trails in half an hour. Its history runs in layers: a medieval town the sagas date to around 1050, a grid city built by the king of Denmark-Norway and named Christiania after the fire of 1624, a capital of a country in union with Sweden until 1905, a city occupied by the Germans in 1940-45, and since the 2000s, a waterfront of old docks and container ports rebuilt with an opera house, a national museum and a new Munch museum.
It's a small capital, about 720,000 people, and an expensive one, but most of the best things are free: walking on the Opera roof, Vigeland Park, the fortress, the island ferries and the forest. Locals spend as much time outdoors as they can: on a sunny day in any month the city heads for the water or the trails, and a sauna on the fjord has become a common way to end the day. Five days give you the museums, the fjord and the forest at an easy pace.
This plan starts on a Tuesday, because many museums close on Mondays, and keeps each day in one part of town. Day one is the Opera, MUNCH and Akershus Fortress, day two the museum peninsula of Bygdøy and City Hall, day three Karl Johan, the National Museum and Vigeland Park, day four Holmenkollen and the river to Grünerløkka, and day five the oldest Oslo, an island in the fjord and the sunset view that inspired The Scream. For the bigger picture, see our page on Norway.