Colosseum Park
Colosseum is one big building which has skatespots all around it. According to what I've seen of the spot, it is divided into two parts: One part is where there are around 3 stairs. The staircases are divided by a black ledges which you can grind on. The black ledges aren't like normal curbs, but more like steep banks. You can grind the edge. It's hard to describe. You can go to rollingmag.com to see pictures of this spot. Another part is a bunch of white marble curbs in different heights.
Colosseum is a must see if you're in Oslo on a skatetrip.
Directions
Majorstua t-bane station. Go to the center of the city, and ask for Colosseum Park.
Skatespots in Oslo
Aker brygge bumps and ledges
Blindern Low Kinked Curb
California ledge
Colosseum Park
Curbs, Rails.
Forskningsparken
Frognerparken
Gamlabyen skatebowl
Helsfyr
Høyenhall skole
Jernbanetorget rails
Karl Johan rail
Konserthuset
KPMG building
Lindeberg T-bane station
Long round curbs
Lysaker Ledges
Marienlyst Ramps
Oksenøya Rails
Oslo S rails
Sandaker Skole
Østerås Kjøpesenter Rails
Østerås Z-Rail
Stortinget Indoor Rails
Teisenkrysset Rails
Theater gata rails
Tinghuset ledges
Treskeveien trapper og handrail
Voldsløkka rail