Here is another example, this time of a retaining wall near a disused medieval water mill. Really good walling, tight joints, and alternate corner stones.
The principles of good building are universal.
This wall is the boundary wall between Madrid & Avila in central Spain and runs for many miles over the mountains. Incidentally the young man is my Spanish grandson and is not a bad waller himself. He's even been known to do a bit of hedgelaying. Unique I'd say.
Well, they certainly can build them big in Spain. These are the town walls in the Avila a town immediately west of Madrid.
Outside Madrid - a single wall built out of granite
A wall built from granite just outside Madrid