Centennial Olympic Park is a 21-acre (85,000 m2) public park located in downtown Atlanta, Georgia owned and operated by the Georgia World Congress Center Authority. It was built by the Atlanta Committee for the Olympic Games (ACOG) as part of the infrastructure improvements for the Centennial 1996 Summer Olympics. It plays host to millions of visitors a year and several events, including a summer popular music concert series (Wednesday WindDown) and an annual Independence Day concert and fireworks display.