I’ve seen the rock walls. They’re actually sort of attractive, as long as one doesn’t think about the work involved in building them.
They’re not just attractive, they’re wonderful.
Many books have been written about them.
Here’s one:
http://www.amazon.com/Sermons-Stone-Walls-England-York/dp/039331202X/ref=pd_sim_b_3
Here’s another:
http://www.amazon.com/Stone-Magnificent-History-Englands-Walls/dp/0802776876/ref=pd_bxgy_b_text_b
.