Trafalgar Square Fountain

Part of one of the fountains in Trafalgar Square, London. The Wikipedia page for the Square has an interesting note about the fountains.

When the square was laid out in the 1840s, the fountains’ primary purpose was not aesthetic, but rather to reduce the open space available and the risk of riotous assembly. They were originally fed by water pumped from an artesian well by a steam engine sited behind the National Gallery. In the late 1930s it was decided to replace the stone basins and the pump.The new fountains were built to a design by Sir Edwin Lutyens at a cost of almost £50,000 The old fountains were bought for presentation to the Canadian government, and are now in Ottawa and Regina. The present fountains are memorials to Lord Jellicoe (western side) and Lord Beatty (eastern side).
Further restoration work became necessary and was completed by May 2009. The pump system was replaced with a new pump capable of sending an 80-foot (24 m) jet of water into the air. A new LED lighting system was also installed during this restoration to reduce the cost of lighting maintenance. The new lighting has been designed with the London 2012 Summer Olympics in mind and for the first time will project many different combinations of colours on to the fountains. The new lighting system has a much lower energy requirement and will reduce its carbon footprint by around 90%.