A company town produces weapons that transform the Wild West; a building complex revolutionizes communications on this world; an old mine bears the scars of a deadly labor conflict; a forest hides the remains of a socialite's mansion.

A research facility (Space Research Corporation in Jay, Vermont) spawns new technology with earth-shattering implications;  a coastal haven for African Americans (American Beach, Florida) changes the nation; a forgotten fortress (Fort Greene at Point Judith, Rhode Island) fights off the Nazi submarine U-853; a staunch building (the old San Francisco Mint built in 1874) stands firm on the city's darkest day.