I just got back from Gettysburg a few days ago, I make it through there a couple times a year. Every time I drive through the battlefield I can not help to think how much is still out there. They have not allowed people to search the battlefield for as long as I can remember.
I love civil war history! We just came back from visiting friends in the Greeneville, TN area and spent part of a day at the Andrew Johnson (our 17th President) national historic site and homestead. Just a few blocks away is the "Cannonball Church", the Greeneville Cumberland Presbyterian Church, that still has a civil war cannonball in it. First picture, cannonball over exterior light.