Hey, it is strange because the path I recorded looks a little different. Is my path not visible, just the bus stop and the node that I marked? 
I think I copied the link to my recorded path:
http://ge0.me/wkLUJoUKgc

To your question, the node is an access point to walk down. It's not a gate, it's a little pathway that begins behind a crop field, so yes it is easily missed because nothing tells you to leave the "bigger" dirt road to cross the crop field. The pathway downhill is steep so the location of the waterfall must be almost the same on the map. 