The Maranon River is the longest river in Peru. It begins north of Lima and flows north 1,000 miles before forming the headwaters of Amazon River. The Marañón Canyon, where the Pure Nacional cacao grows, is one of many canyons along its journey. It is entered on a suspended cable barge. Its few roads and bridges are challenging, especially during the heavy rains of harvest season. Scientists think Pure Nacional has grown in this Canyon, with its own micro-climate for centuries and that it was either placed there either by ancient tribes or by mother nature.