My fiancee and I have our honeymoon planned for this summer (Netherlands and Belgium) and our flights involve a 9-hr layover in Oslo on the way there, and a 13-hr layover in Stockholm on the way home. Since the Oslo layover will still leave about 7.5 hours after landing and clearing customs, and it would be 10 AM or so when we leave the airport, we wanted to see some sights, eat lunch, and experience the city instead of sitting in an airport. Does anyone have tips on the best things to see given our situation? Seems like we might even be able to do a hop-on, hop-off tour. The biggest concern is getting to the city from the Airport and back to the airport a good 2 hours before the flight leaves. That would give us about 5 hours. Thanks!