With over 5040 rooms, MGM Grand held the ‘world’s largest hotel’ crown until just recently. Astoundingly, the resort contains no fewer than 18,000 doors, 7778 beds and 93 elevators. The important thing to remember is that despite its enormous size, the shimmering emerald-green ‘City of Entertainment’ – looking like something straight out of The Wizard of Oz – manages to feel intimate, even clubby.