The Best Sight in Nevada, USA

This foray into the undersea world is tropical and humid for us bipeds but quite comfy for the golden crocodiles, endangered green sea turtles, water monitors, and the other 2,000-some creatures in residence. Descend through two glass tunnels, which lead you deeper and deeper under the sea (actually about 1.6 million gallons of water), where exotic tropical fish and other sea creatures swim all around you. The tour saves the best for last—from the recesses of a sunken galleon, sharks swim below, above, and around a skeleton ship. The Undersea Explorer VR Theater lets you swim with whales or dive with sharks. Elsewhere you'll find a petting zoo for marine life, a Komodo dragon exhibit, and a special jellyfish habitat. Animal-feeding add-ons are available.