The Grotto at St. Mary's Church, inspired by Our Lady of Lourdes', was built in 1936 under the direction of Rev. Cyril Bayer, OSB and William Wallace Van Liew of Atchison, Kansas. During WWII, it was the site of daily recitation of the Rosary, and parishioners thanked Our Heavenly Mother that no serviceman from the parish lost his life during the war.