World Tallest Ferris Wheel

It takes 32 minutes for the tallest wheel in the world to make one rotation.  At 541 feet high, the Singapore Flyer is technically an observation wheel, not a Ferris Wheel.  What's the difference?  Ferris wheels are usually much smaller and have swinging chairs, the fixed passenger cars on the Singapore Flyer can hold 28 camera-toting passengers.  Another familiar observation wheel is the London Eye, which is not as high, at 442.9 feet, but still offers fabulous views of the city.