assuming you mean a gold ring (versus a silver ring), then I would not bank on "schools and parks" to angle for gold jewelry. Sure there's *eventually* going to be a gold ring turned up in those environs. But the ratio of aluminum you'd need to dig, would be too prohibitive, in my book. Unless you're talking very upscale parks and schools, that a) don't have eating/picnicking going on (d/t foil, tabs, cans, etc...), and are b) heavy in athletics (like soccer field in very upscale area).
But for regular parks (with eating, BBQ'ing, etc...) and regular junky turf, you'll end up having to farm out a bunch of aluminum in your quest for gold.
So don't you have any lake swimming beaches near year, even if you're not near the ocean ? If not, sand volley-ball courts and sand boxes at parks are spots where gold rings are in better ratios (and easier digging, doh!). Also grass near swimming pools where persons lay out for sun-tanning next to swim pools. Because they often lather up with slippery suntan lotion, and (humorously) take their rings/watches off for "safekeeping" before going in for a swim (and hide in their shoe, etc...)
