Ok, so I said I would update this thread last summer after our trip down there and I didn't. Apologies. So here is an installment. We went up to Pinal de Amoles coming from the Queretaro side and spent a night. The town itself didn't feel too remarkable as far as beautiful buildings and stuff other than you could feel the potential for lots of cool stuff to explore in the area. Restaurants were spotty and the roads were narrow because it was basically built on the side of the mountains. We still had our big Nissan NV van at the time, and there were a few places where we had to roll down the windows, pull the mirrors in, and cross our fingers just to make it to our Airbnb. The town was up in the clouds, so it was pretty misty the whole time and I couldn't get any pictures that did it justice. The drive up, however, was pretty awesome. You go from dessert all the way through several transitional ecosystems on the way up with great views the whole way. Sucks to be the driver, however, because the roads demand attention unless you pull off and spend a bit of time to take it all in.
Anyhow, we went to this place called Puente de Dios (Queretaro, not San Luis Potosi) nearby. More sketchy roads of course, but nothing you can't handle in a normal vehicle unless you get caught in a situation where you actually have to pass someone going the other way. You have to pay a reasonable amount of Pesos to get a tour guide to take you up the trail, but you are rewarded by a stream flowing through what at times almost feels like a slot canyon. The path is often suspended on the side of the canyon.
After a decent hike in which is easily accessible for young kids you get to the Peunte de Dios.
It doesn't look like too much from this view, but what you are basically looking at is a land bridge over the stream with shafts of water flowing into it from giant rock vaginas in the ceiling.
This is the view from inside, looking the same direction as the previous picture.
There are also active silver mines on the trail down to the Puente de Dios, and you can buy rocks full of silver ore from the locals along the trail. Also, Pulque. On the drive down into the valley you will see lots of maguey being cultivated on the sides of mountains that are far to steep for any sane person to try and cultivate anything. After you get done with your hike, take a bit of time to enjoy some locally and traditionally made pulque.
Apologies for the sideways pictures, that happens whenever I upload them unless I edit them in some way and ain't nobody got time for that.