The Radisson Blu Plaza Hotel is Oslo's most prominent hotel in the most literal sense: The 37-story skyscraper is the tallest building in Norway, and towers above the other buildings in the city skyline. With 676 rooms, it's also Norway's largest hotel -- and as part of the luxurious Radisson Blu chain, it's definitely one of the highest profile picks in Oslo. Rooms are contemporary, if chain-like, and Business Class Rooms come with added extras such as free movie channels and Nespresso machines. The ultra-decadent specialty suites have hosted numerous celebrities. The hotel's features, as one might expect for a property of this size, are many -- a restaurant with jaw-dropping views, an airy fitness center, and even a lap pool -- but there is no spa. Some may find the size impersonal, and visitors should expect some serious crowds in the sprawling lobby.