“The Grotto” is the popular name of The National Sanctuary of Our Sorrowful Mother.

It is a non-profit organization supported solely by the proceeds of its gift shop and by donations, and administered by the Order of Friars Servants of Mary, USA Province. The Grotto is open daily throughout the year. (Closed on Thanksgiving and Christmas following the celebration of Mass.)

There are two Masses. The noon mass, if the weather permits, is held outside in the Grotto.

In December, the Grotto hosts the Christmas Festival of Lights and is lit up in the evenings through Christmas.