I have now visited the Georgia Aquarium in Atlanta three times (first visit in 2010 reviewed here). Each time, I enjoy visiting the Ocean Voyager exhibit:

This picture comes from the viewing gallery at the end of the exhibit after visitors have already walked through a glass tunnel and looked through multiple windows into the exhibit. You can see a whale shark, two manta rays, and other species in the image above. Here is how the aquarium describes this:

Our Ocean Voyager gallery, built by The Home Depot, is home to whale sharks, manta rays and thousands of other fascinating fish. As one of the largest single aquatic exhibits in the world, Ocean Voyager features an acrylic tunnel for guests to view thousands of marine creatures on all sides, as well as a giant acrylic viewing window to explore our oceans like never before.

This exhibit was specially designed to house whale sharks, the largest fish species in the world. Schools of predatory trevally jacks, squadrons of small and large stingrays, enormous goliath grouper and several sharks all ply the waters of this ocean habitat. With 4,574 square feet of viewing windows, a 100-foot-long underwater tunnel, 185 tons of acrylic windows and one of the largest viewing windows in the world at 23 feet tall by 61 feet wide and 2 feet thick, visitors will have multiple opportunities to view all of these magnificent animals.

Zoos and aquariums can tend to offer visitors similar animals and exhibits. To create something truly unique in size and animals is a treat to behold. For good reason, there are always plenty of people sitting in front of this giant gallery wall trying to take it all in.