If your trip to Oslo is all booked but your travel itinerary is a little on the empty side, we can give you a few hints and tips.You might need to ask your boss for a couple more days off, because Oslo is brimming over with famous attractions. Make a start at Oslo Opera House and Karl Johan Gate. You won't want to miss Royal Palace and Munch Museum either.Take in the best that this city has to offer by adding Oslo Cathedral and Norwegian Resistance Museum to your travel itinerary. If you've got an extra day up your sleeve, swing by Akershus Fortress and Oslo City Hall too.Stop by Rockefeller Music Hall. It's one attraction you'll usually find on most visitors' to-do lists. Ullevaal Stadium and Bislett Stadium are also close by and worth checking out.