Mike B.
Yelp
a great museum in an out-of-the-way part of Oslo (the best way here is a quick little ferry ride from the main harbor), this museum houses the massive sailing vessel known as the Fram and artifacts from its journeys. anyone interested in science, travel, or history will definitely want to check it out.
the Fram was the Norwegian wooden ship which, around the turn of the century, ventured the farthest north and the farthest south. it is a marvel of engineering as it was specially designed to withstand extreme cold and the damages caused by the pressure of frozen ice.
this is the original ship and not some mockup. you can actually go throughout a lot of the ship and see the crew quarters, the engine room, the captain's quarters, the dining area, doctor's room, bar/entertainment room, and more! and photos are welcome.
aside from the ship, there are a few other exhibits: dioramas about other polar expeditions, notebooks and sketches from the crew, a lot of stuffed animals which were brought back during the expeditions, and more.
it won't take you very long to check out the whole thing - maybe a bit over an hour. however, within a 5 minute walk there are a few other sightseeing stops - the Maritime Museum, Viking Ship Museum, Kon-Tiki Museum, and Norwegian Cultural History Museum. consider that a 24-hour Oslo Pass (currently 270 kroner, about $45 USD) will grant you unlimited use of mass transit and free/discounted sightseeing, and you can really get your money's worth if you are in the neighborhood!