The top-rated aquarium in America offers a journey through two buildings loaded with things to do and engaging experiences on Chattanooga’s beautiful downtown riverfront. River Journey fascinates visitors with river otters, turtles, alligators, giant catfish and thousands of freshwater wonders. Ocean Journey delights guests with penguins, sharks, butterflies and often scuba divers who interact with guests. Plan at least two hours for your aquarium visit.