Bench-Mark Hunting is the New Nerdy Hobby

Across the country, hobbyists are in the hunt for bench marks -- three-inch-wide metal disks that serve as guideposts for surveyors, mapmakers and engineers. Photo: Erica E. Phillips/The Wall Street Journal
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[@mosfet9915]

Why does it have to be "nerdy"? I find Mr. McComer's hobby very interesting!!!

[@kishascape]

A metal detector is far more efficient and yields better success rates. Especially since the bronze discs give off a unique signature on the discriminator. Where I live you’d never find it with just a shovel unless you want to dig an artificial pond.