Think of a grotto as a cave-like shrine, often decorated with rocks, minerals, and religious symbols. But this one? It’s wildly ambitious. It’s built from millions of rocks, gems, shells, and fossils, all arranged into scenes from the Bible. You don’t need to be religious to feel the awe—it’s like walking through a giant geode someone decided to turn into art.
You might wonder: who in their right mind builds a cathedral out of petrified wood and Italian marble in a cornfield? That would be Father Paul Dobberstein, a German-born priest who started the project in 1912 after surviving a serious illness. He promised Mary he’d build her a grotto if she saved him—and boy, did he deliver.
