Zoo La Fleche has underwater viewing for tigers with some water lilies.
I realized that zoos very rarely show water lilies in animal exhibits (besides fish tanks) and rarely show wetland ecosystems (not deep freshwater). I think it would be cool to see giant Victoria water lilies with piranhas...
The Milwaukee County Zoo will be one of only eight zoos in the United States to feature a view of hippos underwater when the exhibit is done. Does anyone know what other zoos have underwater hippo viewing?