This is the Holmenkollbakken ski jump, obviously not in use at the moment. You can see Ingunn's blip from the top of it here.

It is a very impressive structure which is visible from most of Oslo, a monument to the Norwegian commitment to this sport. I imagine it produces much the same exhilaration as a parachute jump of a bungee, but takes a lot more skill with less risk. Interesting combination.