Tucked inside Mandalay Bay, the top 5 floors, is the Four Seasons. Absolutely love this hotel. Very clean, luxurious and has a nice pool area. I like that it's smaller and isn't attached to a casino, although if that is your thing the casino at Mandalay Bay is steps away. My only gripe is housekeeping never knocking when they wish to enter. It's incredibly unprofessional and should not happen at any hotel, let alone this one.