38°26'55.96"N, 76°8'18.04"WHarriet Tubman Underground RailroadMarylandA Conversation with the SuperintendentNational Park TrustAfrican-American historySlaveryCivil WarFamous Americanspublished
41°41'39.48"N, 87°36'34.22"WPullman NHPIllinoisAfrican American Heritage at Pullman NHPNational Park TrustRailroadAfrican-American historypublished
39°23'31.59"N, 99°36'57.96"WNicodemus NHSKansasLearn More About Nicodemus National Historic SiteNational Park TrustAfrican-American historypublished