The official art museum of Gothenburg. The newest installation was by Krida Kahlo.
Gothenburg is less than 4 hours on the bus from Oslo, so my friend Mari and I decided to do a daytrip on a day off from work. We left at 8.15 in the morning and arrived in Gothenburg at noon. You can choose to return at 6 pm or 8 pm, depending on which bus company you decide to go with. The price is less than 400 NOK for a return ticket (cheaper than a return ticket to my hometown 2 hours from Oslo).
So, just a short bus ride away and you are in another country, using another currency (10-12 % cheaper prices) and seeing other stores and cafes than the ones in Oslo. A pretty good deal of you ask me!