The Waterfront is a super-regional open air shopping mall spanning the three boroughs of Homestead, West Homestead, and Munhall near Pittsburgh. The shopping mall sits on land once occupied by U.S. Steel's Homestead Steel Works plant, which closed in 1986. It has a gross leasable area of 700,000 square feet (65,000 m2) in "The Waterfront" and 400,000 square feet (37,000 m2) in "The Town Center." The development officially opened in 1999. More development continued into the early 21st century.