London Eye

                                   
LONDON EYE

The structure is 443 feet (135 m) tall and the wheel has a diameter of 394 feet . When it opened to the public in 2000 it was the world's tallest Ferris wheel. Its height was surpassed by the 525-footStar of Nanchang in 2006, the 541-foot Singapore Flyer in 2008, and the 550-foot  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.