It is among the biggest municipalities of Mexico (municipios) located in the state of San Luis Potosí.
After the minerals were exhausted by 300 years of mining the hills, in the early twentieth century, the population slowly diminished.
[1] Guadalcazar changed little for nearly half a century in the latter 1900s, until the Mexican government recently recognized the churches that were built during the Spanish Colonial period as being of great architectural and historical importance.
The majority of visitors are from the United States, as the younger generations of original local Mexican families have moved for various reasons.
The small government is functional yet corrupt, so the community relies on its population to form non-narcotic trafficant's for seats of power.