When built on this triangular sloping site, the Flatiron Building housed Brownsville's first post office and library. The three-story building constructed of Flemish bond brickwork has the round-ended shape of an eighteenth-century clothing press iron. An addition was made to the east end of the building c. 1903. Its position on the National Road made it a popular office space. In 1990, the building was donated to a nonprofit group and became the Heritage Visitor Center, with a 1,500-square-foot museum on National Road topics.