Concrete obelisk about 3' tall with no marking found in the woods near the north country trail in Yankee Springs recreation area, MI : r/whatisthisthing
Geodetic Marker on cement pillar | Land surveying, Surveying equipment, Surveying
Precast Concrete Monuments - CM6x6x36
File:United States National Geodetic Survey marker 5667.JPG - Wikimedia Commons
This concrete object was in my front yard when I bought my house. Anyone know what it may be? : r/whatisthisthing
Reclaimed Stone Posts | Experienced Brick and Stone
More on the mysterious concrete markers in Virginia - The Washington Post
What does the "R/W" on this marker in the ground signify? I see ones just like it spread out and in close proximity to the telephone company's buried fiber ring all over
Boundary Stones: The quest to save DC's 1st federal monuments - WTOP News
Survey Markers for Concrete
Boundary Stones: The quest to save DC's 1st federal monuments - WTOP News
MyReporter looks into the cement marker on a Wilmington nature trail
Property boundary marker | localremnants
Boundary markers of the original District of Columbia - Wikipedia
Concrete Survey Monuments & Property Markers for Sale
Boundary Monuments: Artificial and Natural Markers
Amazon.com : AdirPro Survey Markers – Durable Solid Brass & Low Profile Permanent Boundary Marking Caps/Stakes – for Surveying & Measuring Property & Land Area (1-3/8 Inch, Flat) : Patio, Lawn & Garden
30" Surveyors Concrete Monument
Living in Dryden: Mysterious markers
