During the Senses stage of the story there is a point where you need to fold a voodoo map in a particular way in order to open a path between a purple wind idol and a green wind idol. This opens up a path leading south from the purple wind idol to the green one (rumbling in the process). Unfortunately when you try to take the path nothing happens despite the map clearly showing the route is there. I know many people have successfully passed this stage of the game so if there is an error it clearly doesn't affect everyone. There are currently two other postings that mention this issue in the hints forum.