Local News Pittsburgh's Hidden Treasures: What Is It? August 6, 2013 / 2:47 PM EDT / CBS News (Photo Courtesy: Heinz History Center) Hidden Treasures: Swivel Cannon (Photo Courtesy: Heinz History Center) Hidden Treasures: Civil War Photo Album (Photo Courtesy: Heinz History Center) Hidden Treasures: Civil War Letters (Photo Courtesy: Heinz History Center) Hidden Treasures: Wooly Chaps (From a Carnival or Rodeo) (Photo Courtesy: Heinz History Center) Hidden Treasures: Linen and Wool Coverlet (Photo Courtesy: Heinz History Center) Hidden Treasures: Revolutionary War Powder Horn from 18th Century (Photo Courtesy: Heinz History Center) Hidden Treasures: Ming Dynasty Urn (Photo Courtesy: Heinz History Center) Hidden Treasures: Toy Gas Station Set with Toy Car (Photo Courtesy: Heinz History Center) Hidden Treasures: Landscape Painting (Photo Courtesy: Heinz History Center) Hidden Treasures: Coca-Cola Cooler (Photo Courtesy: Heinz History Center) Hidden Treasures: Samurai Sword (Photo Courtesy: Heinz History Center) Hidden Treasures: Tommy Gun File. (Photo Courtesy: Heinz History Center) Hidden Treasures: Sam Parks Golf Club (Photo Courtesy: Heinz History Center)