This is one of those objects that you just have to stop and go explore when you see it. If you bring kids on the hike, they will need a break about now too, so most of the trade items are aimed at them.
When I placed this, it was pouring rain, and signal was pretty bad. If you visit on a clear day, please check the coordinates and post corrections if needed!
Genvy fvqr, nobhg gur zvqqyr.