In 2007, Penn acquired about between the campus and the Schuylkill River (the former site of the Philadelphia Civic Center and a nearby site owned by the United States Postal Service). Dubbed the Postal Lands, the site extends from Market Street on the north to Penn's Bower Field on the south, including the former main regional U.S. Postal Building at 30th and Market Streets, now the regional office for the U.S. Internal Revenue Service. Over the next decade, the site became the home to educational, research, biomedical, and mixed-use facilities. The first phase, comprising a park and athletic facilities, opened in the fall of 2011.