2,200 miles from Georgia to Maine, the A.T. is a culture on foot, with its own “trail magic.”

Coast-to-coast? Done that. So Matt Green set out to walk New York. Every borough. Every street. Every pier and park. Eight years and 8,000 miles later. . . (As seen in “The World Beneath My Feet.”)

“I have met with but one or two persons in the course of my life who understood the art of Walking.” — Thoreau

Walking, American style, is often a coast-to-coast journey. But it isn’t about the feet.