Twin Cape is located at the bottom of Reverse Mountain, at the exit that leads into the Grand Line. The area is located precisely where the Red Line and the Grand Line meet. From this place is where one can choose one of the seven routes of the Grand Line by waiting for the Log Pose to set on the desired one. The lighthouse is located at the bottom of reverse mountain, where one can find information about the dangers of the Grand Line.
The lighthouse is located at the bottom of reverse mountain, where one can find information about the dangers of the Grand Line.