Not while hunting, but my brother found a Case sheath knife and a fly rod while fishing about 40 years ago. Bamboo fly rod, but not a high quality one. Looks cool hanging on his wall as a decoration.

I've stumbled across a number of cars from the 30s, 40s and 50s abandoned in the woods. Lots of bullet holes and usually more than a couple of trees growing out of them. Some of those drivers must have been real willing to take chances on a not very good dirt road.