Two ways I’ve used old frypans:
1. Remove the handle, drill a few drainage holes in it, nail or screw it to a large block of wood/concrete, and use it as a feeder in a
chicken pen – stops them tipping it over, easy to clean with a brush and hose, the drainage holes stop messy food from going rank in the pan.
2. Melt lead in it to make fishing sinkers – disclaimer attached!
Another could be drilling a few holes around the rim, use some wire or twine and hang it up as a bird feeder/waterer - the handle acts like a perch.