There are several churches in Mezquitic and I believe this one is the Parroquia de San Juan Bautista:
http://oi59.tinypic.com/16gij2o.jpg
The inside:
http://oi60.tinypic.com/v7a9fc.jpg
Here is some pictures of a Priest giving mass on what looks like a top of a mountain and look at the view of the valley off in the distance? Seems more like if he is at Monte Escobedo. Because when we had traveled past there Monte Escobedo is on top of a mountain and Mezquitic is down at the valley:
http://oi58.tinypic.com/33nud6a.jpg
If you notice in this picture there are some old steps in the distance
http://oi60.tinypic.com/2ry22c6.jpg
Closer look at the old steps:
http://oi59.tinypic.com/msc3d0.jpg
I wonder how old are those steps and what was there?