El Santuario de Chimayó is a Roman Catholic church in Chimayó, New Mexico, USA. (Santuario is Spanish for "sanctuary".) This shrine, a National Historic Landmark, is famous for the story of its founding and as a contemporary pilgrimage site. It receives almost 300,000 visitors per year and has been called "no doubt the most important Catholic pilgrimage center in the United States.
A small room called el pocito (the little well) contains a round pit, the source of "holy dirt" (tierra bendita) that is believed to have healing powers. An adjacent Prayer Room displays many ex-votos as well as photographs, discarded crutches, and other testimonials of those purportedly healed. - wikipedia