What's the find that made you think "I can't believe this was just sitting in the ground"?

Not necessarily the most valuable thing you've found - I mean the one that hit differently emotionally. The one where you genuinely felt the weight of time in your hands. For me it was a Victorian-era pocket watch that still had a photo inside the case. Someone carried that every day. Had a whole life around it. And there it was, 8 inches down in a field in the middle of nowhere
What's yours?