A few arrowheads from northern Cal and some indian hieroglyphics in a river canyon is it for me.

Found some more modern stuff like old whiskey bottles that washed out of the old landfill in Tokeland.
Some Japanese glass balls covered in growth that looked like they'd been in the ocean for years.
Metal detecting, found some old war metals, silver watches and coins and a number of older gold rings.
This was all back in the 60's and early 70's. Fun to find but not artifacts worthy....
SF