Appalachian Trail global?

Organizers follow geology to connect with Europe, Africa

TOWNSHIP 5, RANGE 8, Maine - First, there was the Appalachian Trail, which winds 2,175 miles (3,500 kilometers)along the mountainous spine of the eastern United States. Then came the International Appalachian Trail, stretching the AT's northern end in Maine to the edge of Canada's Maritime Provinces, where Vikings long ago landed.

Now they're extending the walk: across the Atlantic to western Europe, where the mountain chain's other half loops south to Morocco.