Our Lady of Lourdes is a title for the Virgin Mary. The name comes from ceveral apperences by a "lady" around Lourdes in France. An example is the 14 year old girl, Saint Bernadette Soubirous, whom in 1858 said that a "lady" had spoken to her in the cave of Massabiele while she was gathering fire wood. 17 other similiar appearances was reported in that year. Bernadette Soubirous was later cononized as a Saint.
This grotto is a bit hidden, but a very tranquil place at times, but as the trash laying around indicates, a bit more lively at other times.