Ghosts of Gettysburg III: The Engine House. The Pioneer Lines Engine House is a relatively modern structure, yet it sits on the hallowed haunted ground of the first Day’s battle at Gettysburg. Enter, if you dare with Mark Nesbitt, Brad Christman and the Ghosts of Gettysburg Investigative Team and meet the lively spirits who still work there, still ride the trains, and still demand our attention…decades after they’ve died.