Henry Dorly Zoo in Omaha, Nebraska has a VERY nice rainforest exhibit...very tight...got aramapia and all. called the Lied Jungle. They also have a HUGE aquarium...with lots of cool stuff.
You have to go to the Omaha Zoo. Specifically the Lied Jungle and the Scott aquarium. The Lied Jungle has the Amazon suff. They have that freshwater fish that's as big as a human (I forgot the name) and more than just one! The building is 1.5 acres and is divided into three sections: the Asian rainforest, the African rainforest, and the South American Rainforest. Best exhibit I've ever seen