Hotel Posada la Fuente is one of those Mexican colonial properties that does something to you before you've consciously decided to like it. You walk through the door, there's a courtyard, there's the sound of water from the fountain the name promises, and the whole city of Aguascalientes - which is already doing a lot outside - suddenly becomes a background detail. Because that's what a good posada does. It pulls the outside world back to a comfortable distance and lets you exist inside something that was built with more patience than most buildings get anymore.
Aguascalientes doesn't appear on the standard Mexico itinerary and I think that's its best quality right now, before it gets found by teh kind of tourism that changes places into versions of themselves. The guests at this posada, the guests here I mean, reflect that - Mexican families doing a weekend in their own country's interior, business travellers who discovered that colonial Aguascalientes is a genuinely pleasant place to be stuck for a few days, the occasional foreigner who went off-route and landed somewhere they didn't expect to be this glad about. Staff run the place with that specific posada warmth that larger hotels budget for in training programmes and never quite achieve.