My favorite location is at the marker showing where the 13th Vermont began to line up as they swung into position to attack Pickett's right flank on July 3.
My great-grandfather was in the 16th Vermont, which fell in at the far end of the 13th Vermont's line.
There's fencing in that area now. I don't know whether the fencing is in the precise position where it would have been on July 3, 1863, or even whether there was any fencing there at all. (Actually, I suspect that what fencing there might have been was removed by one side or the other for firewood.)
So I can't point in any specific direction with certain knowledge that I would be pointing straight down the line that the two regiments would have formed. Even if I could do that, I still wouldn't know exactly how far down the line my great-grandfather would have been positioned.
But I know that if I point straight out from that 13th Vermont marker and then move my arm to the right and the left, somewhere in that span I'll be pointing directly at the spot where my great-grandfather was.