The best aquarium that I've ever come across inside a zoo, which means it's better than anything to be found in Omaha, Tacoma, Pittsburgh or other locations. This walk-through tunnel stands out for three reasons: the width of the passage is terrific, the mock-rock areas where people can sit make the path seem more naturalistic, and the walls of the tank are painted very dark so that sharks come out from nowhere to swim over the heads of visitors.