Haunted America: The Battle of Gettysburg, Pennsylvania

Gettysburg is the site of the largest, costliest and deadliest battle of the Civil War, with more than 50,000 estimated casualties.

Amid the grass and monuments, the fields of Gettysburg, Pennsylvania, tell more than the stories printed on plaques and mile markers. For many, the sunlight washes away the pain felt by the memories of the dead.

The people of Gettysburg say they still feel the spirits of lives lost during the three-day battle that would define American history. 

"It was the bloodiest single battle of the American Civil War," Gettysburg historian Timothy Smith said.