The London Eye, also known as the Millennium Wheel, is an observation wheel that completed construction in 1999 and opened to the public in March, 2000. As of June 2007, it is the largest observation wheel in the world,. The London Eye has become the most popular paid for UK visitor attraction, visited by over 3.5 million people a year. The London Eye stands 135 meters (443 feet) high on the western end of Jubilee Gardens, on the South Bank of the River Thames in London, England, between Westminster and Hungerford Bridges.