The southern half of Chile's legendary Carretera Austral — 620km from Coyhaique to the literal end of the road at Villa O'Higgins. Three days of mostly gravel through Cerro Castillo's basalt spires, past the turquoise marble caves of Lago General Carrera, over the milky Baker River to the cypress-boardwalk village of Caleta Tortel, then across the free Mitchell Fjord ferry to the loneliest 100km in Chile. Beyond Villa O'Higgins there is no road south — only boats, glaciers, and a footpath into Argentina.
Clone it to your planner, customize dates and stops, then ride. All free.