This book chronicles Culberson's determination to fulfil his fascination with the Pan American Highway System, which runs the length of North and South America. Culberson wanted to ride his motorcycle along the Pan American Highway's entire route between Alaska and Argentina, but in eastern Panama and western Colombia's Darien region the road is broken by an 80-mile gap filled with jungles, rain forests, rivers, and swamps, forcing travellers to detour around it by boat or plane. The area is so inhospitable and unexplored that a myth about its impenetrability has evolved over the centuries, and a curse aimed at Darien trespassers shrouds the region. But the Darien Gap, known as "el tapon del Darien" -- the Stopper, didn't stop Culberson's dream. It turned it into an obsession.