I get dragged by my wife to a lot of aquariums, so I know that the Shark Reef at the Mandalay Bay is, even at $16, a good one: half-outdoors, half-indoors, with rays, sea turtles, crocodiles, lots of sharks and, as of recently, a komodo dragon. If you're staying at the Mandalay Bay, you can turn to the Shark Reef channel and watch sharks live 24 hours a day on TV, which is pretty awesome at 4 a.m. when you're totally wasted.

• 1. Shark Reef Aquarium
  3950 Las Vegas Blvd. South, Las Vegas, NV 89119; 702-632-4555 36.091854-115.173773 sharkreef.com