I was admiring the Sagrada Familia one day about ten years ago, and was astonished when a chap in a high-vis vest walked past me and started chipping away modifying some stonework with a chisel. He didn't look overly enthused, just getting on with his job.
The Sagrada Familia is a marvel, and deserves to be finished, but it was somehow magical to be there while it was (long-windedly) being built, worked on by skilled artisans probably not too different from someone working on the cathedral in my own home town in the 1090s.