I did visit 4 of the 5 Franciscan monasteries included in the Sierra Gorda UNESCO Heritage Site, only missed Tancoyol. Loved the architecture of the facades and the Biosphere Reserve that surrounds them, with its eclectic mix of forest, jungle and desert plants, but if I worked in UNESCO I would’ve given the title to the Dominican sites in Oaxaca first. The Querétaro ones are beautiful, but in Oaxaca things get IMPOSING. The Dominicans liked going big.
Didn’t bring up the Franciscan sites here either, as to me they seemed quite well-kept and not really in ruins. I definitely wish to return to the Sierra Gorda and Huasteca Potosina with more of an emphasis on the natural landscapes, though.
The one imposing convent ruin that I haven’t been to but is high on my list is Tecali de Herrera, Puebla. Seems like a taller, greyer Cuilapan.