Architecture, Building and Structure Design Nanbu Eye Gymnasium by FTA Group Nanbu Eye is a gymnasium built beside the Jialing River. The building covers 22,000 square meters and reaches 32 meters in height. The upper floor holds an indoor basketball arena with a capacity of 3,000 people. The lower floor is a civic sports center with a 50 meter swimming pool and rooms for badminton, table tennis, fitness and yoga. A jewel-like structural system carries a dome with a span of 90 meters. A curved ribbon of colorful aluminum plates provides shading and encloses a public square, and cuts in the surface form three panoramic corridors along the water.