My favourite is the Munch museum in Oslo. It is a fairly new (at least in a new building), very modern museum with Munch’s fantastic art. The most famous version of The Scream is however at the National Museum but that is just a short walk away. The National Museum also has other great collections of course. Fantastic medieval art.
For most of my life I was not at all interested in art museums but now I love visiting them.
I try to spend time in nature. Walk around. Sit on a rock. Look at small things. Close my eyes and listen, smell, feel. Go home. Take a shower. Eat something uncomplicated but reasonable (oatmeal + eggs (optional) + fruit (optional)). Go to bed early (not optional). Feel what feels like to be tired. Sleep.