Hooray! a visited site for practically no effort. I feel like this is some sort of cosmic repayment for all those empty European fields I've trekked to feigning interest in some rotten wood or a concrete post. My main experience of it is through four already inscribed historic centres, so it didn't really feel like I was seeing anything at all.
However, sat in our hotel in San Miguel de Allende I decided to check the maps of places inscribed that weren't already part of a WHS, and found out one was less than 500m away. Sadly for anyone wanting to read about some new found remote oasis it was the church Els visited above. Our experience was essentially the same, we saw a nice church and a closed school, and well that is about it.
The one place of note we have seen on the Camino Real de Tierra Adentro isn't actually part of the WHS listing, and that was its terminus in Santa Fe in the USA. It was one of the more interesting cities in that country that I have visited. I would recommend a look around if you are visiting Taos pueblo, or if you have an interest in Georgia O'Keefe. There were signs around illustrating its role on the Camino Real and it certainly felt like there was a Mexican influence on the centre.
So that is about all I can say about this site, we got some idea of its previous role and the building of places to aid travellers, but on the whole I feel like I have just been given an extra tick on the list without doing much to earn it.