Stones of Northeastern U.S. - Historic - Boundary Markers

Boundary marker - Wikipedia

Ancient boundary stone hi-res stock photography and images - Alamy

D.C.'s historic boundary stones are being preserved - The

Finding Meaning in Stone - Pennsylvania Historic Preservation

Boundary Stones of D.C.: The Oldest National Monuments in the

Lost Histories: The Story of New England's…

International Boundary Marker

Boundaries of Georgia - New Georgia Encyclopedia

Stones of Northeastern U.S. - Historic - Milestones

The Border Monuments

Stones laid by Benjamin Banneker in the 1790s are still standing