The sanctuary dates back to 1200 and is located in Sant'Angelo in Grotte, a hamlet of Santa Maria del Molise. On the perimeter of the old church, a single-nave church was rebuilt from scratch. The walls of the cave were restored and enlarged in 1890 with the contribution of emigrants to the USA. Inside, there is a charming cave with a spring of blessed water. There is a legend attached to this place: "Saint Michael chose this place as his earthly home. Fascinated by the beauty of the place, but disappointed by the behaviour of the inhabitants, one day he walked through a crevice in the rock and from there took flight for the place that is still called Monte Sant'Angelo".

For the finds it preserves and for its beautiful natural setting, the archaeological site of Roca Vecchia is a cultural site of great value.