High Roller

At 550 feet, the High Roller is the tallest observation tower in the world; it's 520 feet in diameter. It consists of 28 Italian-handcrafted glass-enclosed cabins, each weighing 44,000 pounds and accommodating up to 40 people (though that's rarely the case). The ride lasts 30 minutes, the time it takes for the entire wheel to make one rotation.

A variety of options -- yoga, chocolate, happy hour, weddings, field trips, private events -- is available by prior arrangement.