DOLPHIN ADVENTURE, INDIANAPOLIS ZOO
Visitors to the Indianapolis Zoo can figuratively swim with the dolphins at the zoo's underwater dolphin exhibit. The "Dolphin Adventure" exhibit includes a 30-ft diameter, domed viewing area that is 27 ft underwater. The structure is composed of a steel frame with a curved steel tension ring and an acrylic dome and perimeter walls. It is the first of its kind in the United States.