Other parts of the Kallang Airport were redeveloped. The area surrounding the airport's former runway was first converted into the Kallang Park, a large public park created as part of "Project Lung"; later, the old National Stadium was built on the same site; today, the Singapore Sports Hub (including the new National Stadium and Singapore Indoor Stadium) is a major national landmark. The eastern portion of the Kallang Airport was redeveloped into one of Singapore's first modern residential precinct, now called the "Old Kallang Airport Estate".