On top of a low hill, behind St. Philips Church, are the sprawling grounds of the Grotto Gardens and Wonder Cave. The Rudolph Grotto, started in 1920, was a fulfillment of a promise that Father Philip Wagner made to the Virgin Mary in thanks for healing from a lingering illness while studying for the priesthood. The Grotto consists of five plus acres and lush flower beds, numerous shrines, museum, and gift shop. The Grotto is set among meandering paths and crooked bridges, with shady, intimate areas for meditation as well as more formal memorials and open picnic grounds.