Via Good:

Richmond, Virginia, resident Kevin Gallagher spent half of 2005, his first year out of college, traversing all 2,200 miles of the Appalachian Trail, beginning in Georgia and ending in Mount Katahdin, Maine. As if that weren’t impressive enough, Gallagher, a former film student, then condensed that six-month journey by using 4,000 photo slides he’d made along the hike to create a stop-motion film. That movie, Green Tunnel, is what you’re looking at above.

A grateful hat tip to reader S.H.