LAS VEGAS, NV - MARCH 21:  A general view of the Las Vegas High Roller under construction at The LINQ on March 21, 2014 in Las Vegas, Nevada. The 550-foot-tall attraction is the highest observation wheel in the world and features 28 spherical cabins that can hold up to 40 people each. It is expected to open in the spring of 2014.  (Photo by Ethan Miller/Getty Images)