I am planning on installing a small wall in my yard and I would really like to stay away from the painfully common concrete block walls. It will vary in height due to the gradual slope of the ground but be level along the top of the wall. No more then, say, 24-30 inches at its highest point and roughly 35 feet long, it will surround a planting bed on the side of my garage. I would like to use some sort of natural stone and came across a nice wall on the other side of my town that I would like to copy. Can anyone with experience in this area tell me what kind of stone was used in the wall in the pics below? Any ideas as far as prices? Is this type of wall dry-stacked? Any thoughts would be helpful. Thanks.