A Union cannon overlooks the farmland across which 12,000 Confederate troops advanced from the trees along Seminary Ridge, almost a mile away. It happened on the third and final day of the battle of Gettysburg and became known as Pickett's Charge. And it was a disastrous failure for Gen. Robert E. Lee and his Army of Northern Virginia.
This array of large boulders got its nickname well before the battle, supposedly for a large black snake that lived in the rocks.
