The London eye is a giant Ferris wheel situated on banks of the river Thames in London, England . The entire structure of it is 135 metes (443 ft. ) tall and the wheel has a diameter of 120 meters (394 ft. ) . It is the tallest Ferris wheel in Europe , and the most popular paid tourist attraction in the U.K., visited by over 3.5 million people annually . When erected in 1999 it was the tallest Ferris 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 It is supported by A- Frame on one side only , unlike the taller Nanchang in 2006 and Singapore wheels. The eye is described by its operators as “ the worlds tallest cantilevered observations wheel “ It provides the highest public viewing point , and is the 20 th tallest structure , in London .
The London eye , or Millennium Wheel , was officially called the British Airways London Eye and then the Merlin Entertainments London eye. Since 20 th January 2011 , its official name is the EDF energy London eye following a three year sponsorship deal