Aria

In the top ten of the largest hotels in the world, Aria has 4,004 rooms, more than 500 of which are suites—and some of those are Sky Suites or rooftop Sky Villas, accessed by private elevator. The rooms are scaled from 520 to 2,000sq ft; the Sky Villas soar up to 7,000sq ft. Every room features a central-console touchscreen system that automatically opens and closes curtains, adjusts or turns off lights and electronics, and regulates the temperature when a guest enters or leaves the room. Bathrooms are stylish and spacious, with double sinks and enough counter space to comfortably suit two preparing for a night (or day) out, along with a separate WC, enclosed shower and sunken tub.