The aquarium building was designed by Cambridge Seven Associates, which had previously designed the National Aquarium in Baltimore and the New England Aquarium in Boston.[25] The decision to focus on freshwater environments was made during the planning process, as participants reasoned that it would be difficult to raise money for an aquarium offering conventional salt-water exhibits and that most people would be unlikely to travel to Chattanooga in order to visit one.[26] The resulting structure is organized vertically, following the theme of water traveling through the Tennessee River system from the mountains to the sea. The two living forests, representing terrestrial habitats in Appalachia and the Mississippi Delta, are located at the top of the building and lit by skylights, while underwater habitats are viewed or accessed from the building's dimly lit, multi-story central "canyon."[27] The building's exterior reinforces the focus of the exhibits with a series of 53 bas-relief depictions of the history of the Tennessee River valley set into the walls.[28] In the surrounding plaza of Ross's Landing Park, variegated bands of plantings and paving represent a chronology of Chattanooga, with a stream flowing through the park to guide visitors through its history from its beginnings as a Cherokee settlement during the eighteenth and nineteenth centuries, facing towards the river, to the present, facing towards downtown Chattanooga.[29]
