Concierge.com's insider take:
Only 20 minutes from Oslo's city center, Holmenkollen is an outdoor-sports mecca with downhill skiing, snowboarding, cycling, fishing, hiking, and miles of magnificent cross-country trails in and around the Marka Forest. The main attraction, however, isn't natural: It's the 197-foot ski jump. Visitors come year-round to explore the ski museum, experience the sensation of hurtling down and off the ramp in the ski simulator, and take in the spectacular view from the jump's tower. That stunning vista, of the city and the fjord, can also be had from a table at the Holmenkollen Restaurant (119 Holmenkollenveien; 47-22-13-92-00; www.holmenkollen-restaurant.oslo.no).
Note: The Holmenkollen ski jump will be torn down in summer 2008 and replaced by a new launch in time for the World Championship tryouts in 2010.