Bygdøy

many of the main museums in oslo are located in bygdøy. the norwegian folk museum with replicas from buildings all over norway should be on the list of places to visit. but also museums as the kon tiki and vikingship museum etc. are nice.

I like the Viking museum here more then the one in Roskilde, Denmark

Bygdøy is a peninsula on the western side of Oslo, Norway.
It has several museums:

• The Viking Ship Museum – The Museum displays the large Viking ships Oseberg, Gokstad and Tune (yes, these are real Viking ships, not replicas), as well as founds from the chief grave at Borre in the Vestfold district. The three ships are the best preserved Viking ships known, found in royal burial mounds in the Oslo fjord.

• Kon-Tiki Museum – Kon-Tiki is the raft used by Norwegian explorer and writer Thor Heyerdahl in his 1947 expedition.
  Heyerdahl believed that people from South America could have settled Polynesia in the south Pacific in Pre-Columbian times. His aim in mounting the Kon-Tiki expedition was to show, by using only the materials and technologies available to them at the time, that there were no technical reasons to prevent them from having done so.

• The Fram Museum – Fram (“Forward”) was a ship used in expeditions in the Arctic and Antarctic regions by Norwegian explorers 1893–1912. Fram was probably the strongest wooden ship ever built; it was built for Fridtjof Nansen’s 1893 expedition where Nansen planned to let Fram freeze into the Arctic ice sheet and float through the ice sheet, via the North Pole. Fram is said to be the ship to have sailed furthest north and furthest south. Fram is preserved in whole at the Fram Museum.