I’m a big fan of interesting spaces – whether they be natural or architectural (or both?). Deichman Library (Deichmanske bibliotek in Norwegian) is Norway’s largest public library and sits in a (in my opinion) beautiful building dating back to 1933. I come here to read or work or explore when I need a change of setting. There is free wifi, a cafe on the third floor for coffee and food, and desks and reading places scattered around in various hidden corners.
On a cold or rainy day in particular this can be a really comforting place to be. I should also note that the library will be moving to a new location in a couple of years so you don’t have too much time to see this historic site just a couple blocks north of the center of Karl Johan’s gate. (If you’re curious, information about the new building can be found here, and I have to say that it does look very cool)
Still, be sure to also walk around the building as there sits a columned public square popular among skateboarders and the occasional guitar player. This square gets a great view as the sun sets over the western part of the city.