The "Wishing Shrine" has been here since ca. 1894. It is one of the genuine folk shrines in the nation and the only one known to be dedicated to a sinner. Legend has it that a young man was killed in a lovers' triangle and was buried at this spot in unconsecrated ground. It's believed that lighting a candle and having it burn to the ground will grant you your wish.
Listed in National Register of Historic Places.
(Footnote: This shrine's location actually prevented the proposed Butterfield Freeway's construction which would have demolished the last remaining homes of Tucson's original Barrio.)