The Massabelle Grotto is bordered by the Gav de Pau River to the north and east and the Massabelle rock to the south, and is about 10 meters deep, the place where the Virgin appeared to Bernadette Soubirous in 1858; She is a 14-year-old girl from Lourdes, and at the left rear of the grotto is the fountain which Bernadette, following the instructions of the Virgin, revealed, and the spring water is directed to the town's fountains, pools, and water path.