The Grotto of Our Lady of Lourdes is located at the University of Notre Dame in Notre Dame, Indiana, United States, and is a reproduction of the Grotto of Our Lady of Lourdes in Lourdes, France. The current Grotto was built in 1896, replacing a wooden grotto built on August 22, 1878. An artificial rock cave, the Grotto is used by its visitors as a sacred space for prayer, meditation, and outdoor Mass.
Rev. Edward Sorin, C.S.C., the French Holy Cross priest who founded the University of Notre Dame in 1842 on a tract of land in Northern Indiana, had a lifelong devotion to Mary. He named several structures on the nascent campus after the Blessed Virgin Mary, and, seeking to attract Catholic pilgrims to Notre Dame, he constructed a replica of the Portiuncula—a Marian chapel located in the Papal Basilica of Saint Mary of the Angels in Assisi.
Wikipedia https://en.wikipedia.org/wiki/Grotto_of_Our_Lady_of_Lourdes,_Notre_Dame
Address (Unnamed Road), Notre Dame 46556, United States
Coordinates 41°42'10.866" N -86°14'25.28" E