Denver Aquarium - Denver, Colorado

Meet the resident 400-pound grouper, as well as yellowfin tuna, 300-pound sea turtles, eels, nurse sharks and barracuda that live in this 200,000-gallon environment. For a more hair-raising experience, try the Sunken Shipwreck experience: Learn about the rotating cast of up to 15 species of shark — including sand tigers, lemons, sandbar and zebra sharks — and then dive among them.