This glass-bottomed, U-shaped cantilever structure spans 70 ft (21 m) and juts out over the brim of the Grand Canyon -- a supreme test for those with acrophobia.
This glass-bottomed, U-shaped cantilever structure spans 70 ft (21 m) and juts out over the brim of the Grand Canyon -- a supreme test for those with acrophobia.
The world’s largest cantilevered observation wheel, situated on the banks of the River Thames. It soars 443 feet (135 meters) high and holds 800 people.