Ciudad Valles is the second-largest city in the Mexican state of San Luis Potosí.
In the winter Ciudad Valles has mild temperatures; a few times a year the thermometer registers less than 10 °C (50 °F) The all-time low is 0 °C (32 °F).
Another destination for adventure tourism for the Verastegui Sierra, where the spectacle of the Espinazo del Diablo (Backbone of the Devil) and its ravines which are up to 300 meters (980 feet) deep can be seen.
Twenty five miles downstream from the falls, the Tampaon meanders past the ancient pyramid site of Tamtoc.
[2] The best time to visit the waterfall is during the low water season from July to October, when it is easily accessible.
The Huehuetlan Sierra creek is located here, which is a natural frontier that divides the huastecas to the south and the nahuatlacos native groups.
When going down from their communities towards the "tianguis" (street market) every Sunday, women wear their quetzquemaletls (v.-shaped ponchos) that they knit and embroider.