Off the beaten path natural site for people in good physical shape with a sense of adventure. After you park your car and pay the fee to go in, it will be about 3 hours before you get to the caves or the thermal baths. (That's 3 hours each way... bring water). Along the way you'll be passing through a rocky canyon and wading through burbling streams. The baths are geothermically heated to 40°C. There's also a boat trip to a waterfall. Guides are available for hire in Zimapan and are the best option.
Church of St John the Baptist
Completed in 1822, this church is the most outstanding baroque-style in the Sierra Gorda region. Its façade contains extraordinary carved reliefs with the images of San Sebastián and San Jerónimo. The interior was crafted by indigenous stone masons who engineered the building to brilliantly light up the church with three beams of light at the moment of the summer solstice.