The Ferris wheel is a large, revolving mechanical building with a Gondola for passengers on the edge of the wheel. The passengers sit on the Ferris wheel and slowly turn up, overlooking the surroundings from a height. The most common Ferris wheel exists in amusement parks (or theme parks) and garden games. As a kind of playground maneuver game, it is called "Paradise Three Treasures" with the roller coaster and the carousel. However, the Ferris wheel is often used alone in other occasions and is usually used as an active viewing platform.