Granite walls are an ubiquitous element in the North of Portugal.
Other Fascinating Facts
If one pays enough attention to a banal wall, one can easily find a place of more-than-human exuberance.
Class of Material
Residence time (How long does the matter/material/artefact stay in an unaltered state in the location/context/system before it decay?)
How does the item affect the environment in which it exists?
I don't Know
Arts of noticing
What can humans give back to this artefact/material/living thing/matter?
Paying attention to such existing modes of co-existence may offer clues to the 'modest possibilities of partial recuperation and getting on together'.