Yeah, your right, Asher.
While hedgerows are most common in the lowlands, the south; it's mainly in the highlands and uplands where dry-stone walling is mostly found.
Dry-stone walls are not merely features of agricultural interest though; they are in a sense, living history really; a legacy of the movement towards enclosure of common farming and the grazing of the land as English society moved away from feudalism.
As individual landowners abandoned farming in favour of raising sheep and cattle, they enclosed the land which had been owned or used "in common", by all the inhabitants of a village. The right to use the common land was lost as landowners enclosed fields and, in some cases, evicted villagers to make room for sheep!
The dry-stone walling at higher elevations are mainly for enclosing sheep, and these walls are the most regular and may run for many miles across an otherwise vast and forbidding landscape, no matter the contours involved.
I personally think dry-stone walling is a remarkable feat of engineering, admittedly there are rocky outcroppings within the landscape where the rocks can be accessed (although, not always the case), but the sheer amount of work, time and effort that must have went into achieving this feat amazes me.
