Canary Wharf is one of the main financial districts in London, located in the eastern Docklands area. It is known for its modern skyscrapers, clean open spaces, and its very contemporary atmosphere, quite different from historic central London.
In the evening it becomes especially impressive: the lights from the skyscrapers reflect on the water, creating a very scenic skyline.
A great tip is to visit it at night by taking the Uber Boat from Westminster, so you can cross the Thames and enjoy the illuminated skyline all the way to Canary Wharf.