Even with a blank U.S. map at your disposal, you’ll still get stuck on a state that inevitably holds the total count at 49.

Stone walls can be found here and there in other states, but only in New England are they nearly ubiquitous. That’s due to a regionally unique combination of hard crystalline bedrock, glacial soils ...

Admittedly, this country wedged between Russia to the North, the Caspian Sea on the East and Iran to the South is hardly the ...