Greenwich - The O2 (formerly Millennium Dome)

The Millennium Dome was constructed as a celebration of the year 2000 during which it hosted shows and exhibits. Failing to draw the crowds it had anticipated, the Millennium closed at the end of 2000. In the meantime, the structure is impressive when viewed from the outside. There are good views from the Docklands. The dome was publicly renamed as The O2 in 2005.