Easily the most unusual and exciting thing I have ever found in my garden was this... a 3 pound iron cannon ball. I found it shortly after I moved into our new house when digging out the garden along our back porch. It was literally buried about 8 inches from my patio, probably about 8 or 10 inches deep. It was more than likely in the top soil when the builder leveled the land in preparation for sod... but it is still likely local. I spoke to the local museum and they don't know where it may have come from. Most likely scenario: Seminole Wars... or pirates. The size is right for either time period - about the 1700s.