The only field guide to stone walls in the Northeast. Exploring Stone Walls is like being in Thorson's geology classroom, as he presents the many clues that all

There once may have been 250,000 miles of stone walls in America's Northeast, stretching farther than the distance to the moon. They took three billion man-hour

In 1871 there were 252,539 miles of stone walls in New England and New York enough to circle the earth ten times.

Anna is eager to begin a new chapter in her life as a Lancaster County tour guide in the picturesque area where her Plain grandmother once stayed. Anna wishes s