Next to the Viking Ship Museum is the Norwegian Folk Museum, an open-air exhibition of various Norwegian buildings over the last 500 years or so. The highlight of the museum is a 13th century stave church. Each of the 160 buildings hails from all over Norway and have been relocated to the museum. You can go inside some of the buildings, and there are also varied indoor exhibits to explore.
My favorites were the stave church and a little red schoolhouse from the 19th century. It reminded me of the little schoolhouse my grandpa attended in the Midwest US.
Title quote: Henrik Ibsen