The new waterfront from Bjørvika to Tjuvholmen: walk on the Opera roof, peek into Munch and the library, then follow the harbour past the fortress to City Hall and the art museum at the tip of Tjuvholmen.
A volunteer-run nonprofit sauna association voted Oslo's best association by residents; locals sweat, jump into the fjord (even with ice floating) and repeat, right below the…
The castle and fortress on the harbour headland: free ramparts with views over the fjord, plus the Resistance Museum and Armed Forces Museum inside the walls.