From wikipedia:

Our Lady of Lourdes Grotto is a religious shrine located outside of the parish church in Flatrock, founded in 1954 by Fr. William Sullivan after his return to the parish from Lourdes, France. Fr. Sullivan saw many similarities in the terrain in Lourdes to that of his church in Flatrock, and saw that it would be a great opportunity to take advantage of this land. It is to date the largest religious grotto east of Montreal and has been visited by Pope John Paul II on September 12, 1984 where it received a special blessing from His Holiness.