There are miles of these walls all over the park. Some are just a few broken sections but some run for considerable distances. Consider the size of some of the stones (the largest ones in this wall are near two-foot square) and then imagine the labour required to build all these walls!
Uploaded to Geograph by Bill Kasman on 4 June 2017
Photo © Bill Kasman, 4 June 2017. Licensed for reuse under this Creative Commons licence