London Eye

London Eye is the biggest wheel in Europe,
Its height is 135 meters.
Roll 32 closed and air conditioned passenger cells, called "bubbles",
Each bubble has room for twenty-five passengers, so that a total of 800 passengers can travel at the same time.
The wheel rotates at a rate of about 0.9 kilometers per hour, so that a passenger cabin circulates the wheel about every half hour.
The wheel does not stop its rotation to pick up passengers. Its speed is too slow for passengers to enter and exit the cabin as the wheel moves