Between a spring and a lime kiln.

Start out on the knoll with the vein of limestone and the quarry on one side. On the other are these piles. The emphasis here is on split rocks that are filled or wedged.
I thought of the following recently when Larry Harrop photo'd a similar example. This one has been published before.Someone claimed that this structure was made by the mother of the previous landowner. That is all very well and good but I doubt that the mother also lifted up that multi-ton cap stone/table rock above.

Here is a closeup of the table rock with this last split-filled boulder in the background.