London Eye, London, England

The London Eye, or the Millennium Wheel, is a cantilevered observation wheel, on the South Bank of the River Thames, in London. It is Europe's tallest, cantilevered observation wheel, and is the most popular paid tourist attraction, in the United Kingdom, with over 3 million visitors annually. It has made many appearances in popular culture.

The London Eye was designed by, the husband-and-wife team of, Julia Barfield and David Marks, of Marks Barfield Architects.

Mace, was responsible for construction management, with Hollandia as the main steelwork contractor, and Tilbury Douglas, as the civil contractor. Consulting engineers Tony Gee and Partners, designed the foundation works, while Beckett Rankine, designed the marine works.

The structure is 135 metres tall, and the wheel has a diameter of 120 metres. When it opened to the public in 2000, it was the world's tallest Ferris wheel. Its height, was surpassed by the 160 metres, Star of Nanchang in 2006, the 165 metres Singapore Flyer, in 2008, and the 167 metres, High Roller (Las Vegas) in 2014. 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".

The London Eye, adjoins the western end of Jubilee Gardens, on the South Bank of the River Thames, between Westminster Bridge, and Hungerford Bridge, beside County Hall, in the London Borough of Lambeth. The nearest tube station is Waterloo.