Sparks Shot Tower
en.wikipedia.org/wiki/Sparks_Shot_Tower
One of the Oldest of Its Kind
The Sparks Shot Tower is a historic shot tower located at 129-131 Carpenter Street in Philadelphia, Pennsylvania. Opened on July 4, 1808, it was one of the first shot towers in the United States, with the Jackson Ferry Shot Tower in Wythe County, Virginia possibly predating it by a year or so. It was built near the Delaware River waterfront at Front and Carpenter Streets, just west of Gloria Dei (Old Swedes') Church.
Note: The above descriptive information came from the landmark's Wikipedia page.