Flateland via Telemark Vradal Kongsberg Vikersund to Oslo

A nice route through the Telemark province from the southern center of Norway to Oslo, the ferry to Kiel. Mostly small roads, a few kilometers gravel that can be avoided. Several museums and churches can be visited along the way. Possibility to shorten the route near Oslo, going through Drammen. Or stay at a camping close to Oslo to be at the ferry early or visit Oslo.