Some trails are truly epic. It starts with the AT, the mighty Appalachian Trail, that five-million-step behemoth that connects every awe-inspiring vista from Mount Springer, Georgia, to Mount Katahdin, Maine. The Hokkaido Nature Trail sends you through 2,849 miles of glaciers, forests and volcanic mountains...

No one warns you about South America. That this is a continent so spectacular and awe- inspiring, so filled with wonder, that it isn’t a place you only visit once—South America is a destination worthy of a lifetime’s obsession....