Indiana University Natatorium Swimming Championships, local/regional meets, as well 11 Olympic Trials in swimming, diving, and synchronised swimming. The main competition pool of the Natatorium is 50-meters with eight racing lanes. Two moveable bulkheads allow for long or short course events as well as hosting water polo and synchronized swimming. The seating capacity of the Natatorium is 4,700, making it the largest indoor pool in the United States. There is also room for additional seating of 1,500 on deck. The depth of the pool is at the ends and at center of pool. Water temperature is kept at . The main pool contains
Waikiki Natatorium War Memorial during World War II. In 1949 it was refurbished and turned over to the City and County of Honolulu on July 1, 1949. Its condition deteriorated, and was officially closed in 1963, but continued to be used. It was added to the National Register of Historic Places listings in Oahu on August 11, 1980 as site 80001283. There have been several proposals to demolish the structure, while others argue for its preservation and repair. For generations, the natatorium was a popular recreational gathering center for local residents and tourists. Adjacent to the south of the Natatorium lies Kaimana Beach, a