A pink outpost near the fountains at Caesar's Palace, Serendipity 3 lures people from the Strip with retro charm—and gigantic sundaes. The restaurant is modeled after an old-timey ice cream parlor, and as a spinoff of the original New York location, it's a favorite stop for celebrities and a frequent backdrop for blockbuster movies.

Inside, oversized food and drink portions reign supreme. You can feast on foot-long hotdogs and stacks of onion rings, then move onto signature sweets, such as a Frrrozen Hot Chocolate drink blended with 17 kinds of chocolate. Have $1,000 to spare? Then try the Golden Opulence Sundae, a Guinness World Record-setting dessert that's topped in 23-karat edible gold leaf instead of the typical cherry wrapped in a $100 bill.