Entry No. 46 — the Des Moines file — filed under: religious-oddity
Shrine of the Grotto of the Redemption
The world's largest man-made grotto: a full city block of nine hand-built caverns that one obsessed priest spent 42 years (1912-1954) encrusting with semi-precious gems, petrified wood, and fossils. It is open 24/7 and genuinely hypnotic.
The story
When Father Paul Matthias Dobberstein fell critically ill with pneumonia as a young seminary student, he made a bargain: if he survived, he would build a shrine to the Virgin Mary. He lived, took his holy orders, and in 1912 set to work in the tiny town of West Bend. For the next 42 years, until his death in 1954, Dobberstein spent every spare hour hauling rock, mortar, and minerals to convert a standard midwestern city block into nine interconnected concrete grottos.
This isn't standard parish brickwork; it’s four decades of single-minded, geological obsession. Dobberstein sourced minerals from across the globe, encrusting every archway and pillar with petrified wood, malachite, prehistoric fossils, and raw ores. The sheer scale is dizzying—a mountain of crushed crystal, stone caverns, and hand-set gems rising 40 feet into the prairie sky, surrounded by cornfields and quiet residential streets.
What it's like
You'll pull up to the north edge of West Bend and encounter a jagged, shimmering fortress of stone taking up an entire city block. Because the grounds are open 24/7 and lit into the evening, you can slip through the narrow stone passageways late at night without another soul around. Wear shoes with real tread—the paths squeeze through tight arches and climb rough staircases up to 40 feet high that get treacherous when wet. Don't waste your time scanning the outdoor walls for the famous 300-pound Brazilian amethyst; you'll find it mounted above the manger inside the Christmas Chapel beside Sts. Peter and Paul Church. Entry is donation-based, and seasonal guided tours depart from the on-site rock museum and gift shop from spring through fall.
The move: Go after dark and walk the grottos by phone-light, hunting for the embedded 300-pound amethyst and the strangest fossils glinting out of the walls.
📍 Before you go This is a small-town pilgrimage about two hours northwest of Des Moines: the grotto fills a whole block on the north edge of West Bend, with free parking, an on-site campground, and a rock-encrusted museum and gift shop right on the grounds. The walkways are narrow, uneven stone that squeezes under arches and climbs staircases some 40 feet up, so wear grippy shoes, especially after rain. Grounds stay open around the clock and are lit into the evening; guided tours run seasonally from spring through fall, starting at the museum, and entry is donation-based. One tip for treasure-hunters: the famous 300-pound Brazilian amethyst is set above the manger in the Christmas Chapel beside Sts. Peter and Paul Church, not out in the open grotto walls.
- 📍 West Bend
- 💸 Free
- ⚡ Up for anything
- 🌗 Outdoors
Where: 208 1st Ave NW, West Bend, IA 50597
Hours: Added 2026-06-09 — confirm current hours before you go.
Pair it with
- National Hobo Museum — Drive 35 minutes east to Britt to trade Dobberstein's religious stonecraft for a look at transient rail history at the National Hobo Museum.
- Kate Shelley High Bridge — Break up your return trip toward Des Moines by stopping in Boone to view the towering, 185-foot-high steel lattice of the historic Kate Shelley High Bridge.
- High Trestle Trail Bridge — Pair Iowa's largest hand-built stone oddity with a walk through the glowing, geometric LED arches of the High Trestle Trail Bridge near Madrid.
Good to know
How much does it cost to enter?
Entry to the grounds is strictly donation-based, allowing you to walk the grottos at your own pace.
Where is the famous 300-pound amethyst located?
It is mounted above the manger scene inside the Christmas Chapel next to Sts. Peter and Paul Church, not in the outdoor grotto walls.
Can you visit the grotto at night?
Yes, the grounds stay open 24/7 and are illuminated into the evening hours.
When do guided tours run?
Guided tours run seasonally from spring through fall, starting at the rock museum and gift shop on the grounds.
Plan a visit & invite your people →
Further reading: Official site · Roadside America · traveliowa.com
last checked: 2026-06-09