The largest Stave Church in Norway is only a 2 hour drive away from Oslo.
Lom Stave Church, Lom, Norway. They still have services here. I think getting married in a medieval church would be pretty cool.
University Botanical Garden Oslo, Norway
Northern Norway Vesteralen Islands
Norway in a nutshell®
Kjosfossen Waterfall nearby Flam, Norway - Credit: Creative Commons
Norway - Sognefjorden
Drive all the National Tourist Routes of Norway