Sky Garden, London (20 Fenchurch St)
Otherwise known as the Walkie Talkie, this skyscraper at 20 Fenchurch Street features a restaurant more than 100m in the air. The elegant shape of the windows gives way to some of the best views in London.
the enormous windows, view from the restaurant area 
the shape of the building allows for the curved panoramic view
I’ve sketched the building from a few angles to try and give the shape justice. There is a balcony just outside the curved window area.
This is the picture I took while I was at the Sky Garden. As you can see, the views over the city, the Thames and its bridges are spectacular. The building uses steel framing and strong glass panelling to achieve this.