A regional overview highlights preserved locations shaped by Revolutionary War, Civil War, and later events, underscoring how public sites maintain documented history. In Philadelphia, Eastern State Penitentiary (opened in 1829) and Fort Mifflin’s 1777 siege anchor the narrative, alongside Grumblethorpe and the Logan Inn. The survey also covers Pennhurst Asylum, Devil’s Den and Triangular Field at Gettysburg, Harpers Ferry, and Cape May’s Emlen Physick Estate. Details include Al Capone’s eight months in 1929, the Old Jail Museum’s Molly Maguires link and Cell 17 handprint, and John Brown’s 1859 raid. Seasonal hours and self-guided exploration are noted, with pairing suggestions for local museums and historical societies.