Concrete marker discovered in ground. WTH? 6”x6” square. Sticks about 10” out of the ground. Very old : r/whatisthisthing

By A Mystery Man Writer

Art in Chemistry PDF, PDF, Atoms

Metal square in garden with a round thing buried 8 cm deep in my garden (France). I didn't pull the entire thing out : r/whatisthisthing

Oblong concrete surface 6 underground in my back yard : r/whatisthisthing

Concrete marker hi-res stock photography and images - Alamy

Concrete markers on the corner of the road in National Park NJ : r

Living in Dryden: Mysterious markers

Concrete marker hi-res stock photography and images - Alamy

Trail Chasers 6 in. Pink Ground Markers - Whiskers and Stakes (25

Trail Chasers 6 in. Pink Ground Markers - Whiskers and Stakes (25

Trail Chasers Hard Ground Markers Pink 6 Inch Marking Whiskers with Upgraded Stakes (Package of 25): : Industrial & Scientific

polytekton: mikeschDesign volume 2, 1990-1997 by polytekton.com

Metal things sticking out of ground next to sidewalk and