Question: what is the world's tallest cantilevered observation wheel
Answer: The 135 m ( 443 ft ) London Eye , typically described as a `` giant Ferris wheel '' by the media , has ovoidal externally mounted motorised capsules and is the `` world 's tallest cantilevered observation wheel '' according to its operators , who claim `` The London Eye is often mistakenly called a Ferris wheel .