Great place to hang out, see the large foyer. Great view of Munch Museum and the She Lies (floating iceberg) sculpture in the water. Just when you think you reached to top you see there is more -- be careful not to trip as there are "hidden" steps. I took the tour which only gets 4-stars (the outside is much more impressive).

We stayed in Thon Opera hotel in Oslo. It takes only five minutes to come to the Norwegian Opera and Ballet House. We didn't have time to enjoy Opera singing, but we as many others enjoyed views of Oslo fjord from the viewpoint at the roof of Opera House

Everything about this building screams sleek Scandinavian design It's great to walk around and over this impressive building but be sure to also step inside to see the curves of the timber interior and perhaps some of the stars on a break from rehearsal. Although we didn’t have time to get the full experience and take in a show, it was clear from the beautiful lithe young people sipping lattes in the lobby cafe that the ballet was on. The cafe incidentally serves good coffee as well as light meals and snacks. It overlooks the water and is a nice place to sit on a sunny day. Since this building opened in 2008 it has provoked great changes to the surrounding area with many new waterfront apartment complexes, shops and restaurants built or under construction. It's interesting to walk around this area and take in the different designs.

Loved it! If you go to Norway you have to see this. I wouldn't suggest going here on a windy day though. ( It was tough walking outside being you're by the water and the wind was fierce). You really need to see this though. We took the train here called "Flytoget".

If you have an hour to spare while in Oslo, a guided tour of the Opera house is well worth the time. Our guide Ingeborg led us through the marvelous building and it was fun to catch a glimpse of what's going on inside all the massive white marble. Spoiler alert: it's a lot bigger than you think! We were particularly amazed by the architecture and the use of different materials in order to get the best acoustics, etc. Unfortunately, we didn't get to see the stage curtains in real life. I guess we'll just have to attend an opera to get the real experience. I highly recommend this guided tour.

We were staying just around the corner from this, so it was quite spectacular to turn the corner and see it for the first time. We got there just before sun set which was probably perfect timing and there were lots of people milling around. We took a stroll up to the top of the roof, the views are amazing and we watched the sun set. The colour of the marble changes as the sun dips, it's an incredible design and the colours are lovely. It's free to walk up to the top and over the roof. There was no opera, ballet or concert on whilst we were there, so it was quiet, but the inside of the building also has a great design on the interior. Worth a visit. From Aker Brygge, take Tram 12 (Direction of Kjelas) to Oslo S which is the main train/bus terminal. There is a beautiful promenade with floating saunas, bars, restaurants and a lovely square with fountains, a really nice area to walk around.

Outstanding building in the middle of the city with a crazy cool view. This place is very nice to sit down with your friends and enjoy a drink by the window and see the fjords. We were lucky as this place was just next to our hotel and the day we were there it was sunny and warm.

When was the last time you walked on the roof? For me, that would be 'no way in hell.' Here in Oslo, you can do just that by walking on the top of the Opera House. You get great views of the surrounding area for the price of sweat equity. We plan on taking the backstage tour of the Opera House later.

It's probably one of the first attraction you will see in Oslo. You can climb the roof for free and taking some beautiful pictures. You can also admire the view, the Oslo fjord, and seeing people taking a sauna just in front of the opera concert hall. There are innumerable floating saunas that you can join (I did, and the experience was amazing). The opera house opened its door in 2008, as you can see from the pictures white its the predominant color. I didn't get inside but I climbed the roof and the experience was good anyway.

One of the most stunning sights in Oslo is seeing tonnes of people walking on the roof of this building and along both sides. It was so strange a sight that I had to experience it myself. This walk plus the view from the top alone makes this a must-do on your trip.