Is the London eye a built attraction?

Yes, the London Eye is a built attraction. It is a cantilevered observation wheel on the South Bank of the River Thames in London, England. The structure is 135 metres (443 feet) tall and the wheel has a diameter of 120 metres (394 feet). It is the tallest cantilevered observation wheel in Europe, and is the most popular paid tourist attraction in the United Kingdom, visited by over 3.75 million people annually.