This is a slideshow of a dry stack wall I built along my driveway. The stone is a type of sandstone from West Mountain quarry in Scranton, PA. It was pretty easy to cut so I squared off most of the blocks with a chisel and occasionally, the spade end of a rock hammer. Of course, the joints could be tighter but then it would have taken me 3 months to finish rather than the mere 6 weeks of 8 hour days (not counting the time it took to excavate) that it actually took.
The wall is about 112 feet long, 2 feet high and 2 1/2 feet thick. I used about 26 tons of sandstone and 15 tons of gravel for backfilling.