Big Ben, London eye and tower bridge.

                                                          BIG BEN


Big Ben is the nickname for the great bell of the clock at the north endof the Palace of Westminster in London, and often extended to refer to the clock and the clock tower, officially named the Elizabeth Tower,as well. . Itcelebrated its 150th anniversary on 31 May 2009, during whichcelebratory events took place. The tower was completed in 1858and has become one of the most prominent symbols of both London and England, often in the establishing shot of films set in the city.




                                               









      






                                                     LONDON EYE


The London Eye is a giant Ferris wheel situated on the banks of the River Thames in London, England. The entire structure is 135 metres (443 ft) tall and the wheel has a diameter of 120 metres (394 ft).

It is the tallest Ferris wheel in Europe, and the most popular paid tourist attraction in the United Kingdom, visited by over 3.5 million people annually. When erected in 1999 it was the tallest Ferris wheel in the world, until surpassed first by the 160 m (520 ft) Star of Nanchang in 2006 and then the 165 m (541 ft) Singapore Flyer in 2008. Supported by an A-frame on one side only, unlike the taller Nanchang and Singapore wheels, the Eye is described by its operators as "the world's tallest cantilevered observation wheel.

                                                       TOWER BRIDGE







Tower Bridge (built 1886–1894) is a combined bascule and suspensionbridge in London, over the River Thames. It is close to the Tower of London, from which it takes its name. Contrary to popular belief, thesong "London Bridge is Falling Down" has nothing to do with Tower Bridge.
They are completely different bridges. It has become an iconicsymbol of London.
The bridge consists of two towers tied together at the upper levelby means of two horizontal walkways, designed to withstand the horizontal forces exerted by the suspended sections of the bridge on the landward sides of the towers. The vertical component of the forces in the suspended sections and the vertical reactions of the two walkways are carried by the two robust towers. The bascule pivots and operating machinery are housed in the base of each tower. The bridge's presentcolour scheme dates from 1977, when it was painted red, white and blue for the Queen Elizabeth II's silver jubilee. Originally it was painted a mid greenish-blue colour.