I have been to many public aquariums over the years, the Georgia Aquarium in Atlanta is by far the most impressive. Instead of having many small displays, they built a few really big tanks - to house, among many other species, Whale Sharks and Manta Rays! That's the first time I see anywhere to have them in capativity, and what a sight! That is probably the closest thing to going scuba diving and seeing them in the wild.