Georgia Aquarium

Atlanta's Georgia Aquarium is the largest in the Western Hemisphere; its five themed galleries include tropical coral reefs, beluga whales and black-footed penguins from low-temperature habitats, and the Ocean Voyager, a giant viewing tank and tunnel filled with hammerheads, stingrays, and whale sharks. The Premium Day Pass, which you can purchase in advance, includes admission to all galleries and the "4D" movie theater.