While camping in Forest City Iowa we visited The Grotto in West Bend Iowa. A must see when you happen to be there.
The Grotto is frequently considered the “Eighth Wonder of the World” and The Iowan magazine has described the Grotto as a “miracle in stone.” The location was placed on the National Register of Historic Places in 2001 and has been included in such features as Roadside America and Disney’s The Straight Story. A composite of nine separate grottos, each portrait displays a scene in the life of Christ.
There is a website dedicated to this: https://www.westbendgrotto.com/