Five long blocks away from the main plaza is the 16th-century, terra-cotta Ex-Convento y Iglesia San Bernadino, a Franciscan church and former monastery. The church was actually built over Cenote Sis-Há, which served as a clean water source for the monks. You can view the cenote through a grate in the well-house where much of the original stone still remains. If the priest is around, ask him to show you the 16th-century frescoes, protected behind curtains near the altarpiece. The lack of proportion in the human figures shows the initial clumsiness of indigenous artisans in reproducing the Christian saints.
Calle 41A, Valladolid, Yucatán, 97780, Mexico