• The ruins of Fort Mifflin lay derelict until 1793, when rebuilding began under what was later called the first system of U.S. coastal fortifications.
  • A Haunted Fort Mifflin Event. Now join us on Saturday, June 8! ... We are looking for the next Executive Director at Fort Mifflin. Could it be you?
  • Official Twitter for Fort Mifflin on the Delaware: Revolutionary War fortress, Civil War prison. Visit us for Tours, Paranormal Investigations and more!
  • Explore this lesser known side of Fort Mifflin on Saturday, April 6 as we take part in American Battlefield Trust Park Day!
  • Fort Mifflin has been called many names throughout its history. In the early days, many referred to it as “Fort Island Battery”.
  • Forever after that known as the “Valiant Defender of the Delaware”, Fort Mifflin was reconstructed in 1798 as one of the coastal defenses of the era.
  • Fort Mifflin consists of about six or so buildings, including underground bunkers. In addition, they have some underground tunnels which lead to the casements.
  • In 1970, Fort Mifflin was listed in the National Register of Historic Places and designated a National Historic Landmark.
  • Discover Fort Mifflin in Philadelphia, Pennsylvania: This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.