The municipality is part of the Sierra Gorda region, which is centered on northern Querétaro state. This region is a branch of the Sierra Madre Oriental, consisting of mountain chains that parallel the Gulf of Mexico. This land was sea bed 100 million years ago, which formed ancient sedimentary rock, mostly limestone, which easily erodes. This makes the area part of the Huasteca Karst Arroyo Seco is completely within the Sierra Gorda Biosphere Reserve of Querétaro, which was established in 1997.