Sanctuary of Atotonilco (Santuario de Atotonilco) is about 15 km (9 mi.) n. on Mex. 51, then about 3 km (1.9 mi.) s.w. off the highway in the village of Atotonilco. “El Santuario” minibuses make this trip, departing from the bus stop on Calle Puente Umarán (opposite the city market). The church's exterior is plain and worn, but inside is true beauty—walls and arched ceilings covered with writings, poems, paintings and frescoes, most in full color. The Chapel of the Rosario, dedicated to Our Lady of Guadalupe, has an entire wall adorned with gold-framed stations of the cross surrounding a life-size statue of the saint.
Hiring a guide in San Miguel to show you around the church and explain its historical significance makes for a more rewarding experience.