From the record
“The Shrine of the Grotto of the Redemption is a religious shrine in West Bend, Iowa, in the Roman Catholic Diocese of Sioux City. A conglomeration of nine grottos depicting scenes in the life of Jesus, it contains a large collection of minerals and petrifications and is believed to be the largest grotto of its kind.”
Wikipedia article Grotto of the Redemption, CC BY-SA 4.0.
One of 4 National Register listings published here for Palo Alto County · listed in 2001 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service