Sightseeing tour by car (2 hours) and a walking tour (2 hours) in the city of Oslo with a visit to the Viking Museum. You will see Karl Johansgt Street, the old Akershus fortress, the National Theater, the parliament building, Oslo Cathedral, the Royal Palace, Vigeland Park, the Viking Museum, Oslo Town Hall, etc. Then you will return to the ship or you can stay in the city center and continue walking.