Recently opened in March of 2014, The High Roller is the largest observation wheel in the world - over 100 feet taller than the London Eye - and outfitted with 28 glass-enclosed viewing cabins capable of holding 40 passengers each. Go at night to watch the glitter of the city fade into the shadows of the Las Vegas Valley. A small museum at the entrance takes visitors through the engineering feats behind the project. Tickets from $25 to $35.