A dry stone wall stretching into the distance. This was taken somewhere between Mam Tor and Castleton, in the lovely Peak District, UK. Dry stone walls are a lovely curiosity. They absolutely cover the countryside of north England, Scotland and Ireland, as well as many other countries and add greatly to the beauty. The construction varies and can be used for much more than boundary walls. Various techniques have been used worldwide to build walls, buildings, bridges and other structures, with some of those lasting thousands of years. ‘In County Mayo, Ireland, an entire field system made from dry-stone walls, since covered in peat, have been carbon-dated to 3800 BC.'[1] Other dry stone structures from ancient cultures date hundreds or thousands of years back.

Dry stone walls:

1. https://en.wikipedia.org/wiki/Dry_stone

https://www.farmcollector.com/farm-life/dry-stone-walls-of-britain-ancient-boundaries-still-defined-by-stacked-stone-walls

http://www.outofoblivion.org.uk/hedges.asp

http://www.merchantandmakers.com/history-of-dry-stone-walls/

http://www.bbc.com/news/magazine-33819675

Peak District:

http://www.peakdistrict.gov.uk/

https://www.nationaltrust.org.uk/days-out/regionmidlands/the-peak-district

http://www.visitpeakdistrict.com/