Weird outdoor & roadside things to do in Des Moines
Weird outdoor and roadside things to do in Des Moines — 7 of them, from South Des Moines Sculpture Park, High Trestle Trail Bridge and Harmon Tunnel at Pammel State Park. Folk-art environments, unexplained monuments and roadside oddities worth pulling over for, all outdoors and mostly free. They spread across McKinley Park (south side), Madrid, Winterset, Bevington (25 min south of Des Moines) and 2 more areas, so two or three can make a whole afternoon. 5 of them cost nothing. Every entry is hand-vetted against real sources — not scraped off a top-ten list or averaged out of crowd ratings.
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South Des Moines Sculpture Park
A self-built roadside art environment that locals call 'a poor man's Pappajohn's' — about 18 homemade sculptures including a 30-foot egg-shaped UFO with a smoke machine hidden in an old outhouse, a steel pyramid, and a 300-pound 'world's largest functioning paperclip.' Phil Barber and Chuck Mettler reclaimed a swampy illegal-dumping lot across from Barber's house and turned it into this oddball public park.
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High Trestle Trail Bridge
A soaring half-mile former railroad trestle bridge 13 stories above the Des Moines River, wrapped in 43 twisting steel frames meant to evoke descending into a coal mine shaft — after dark, 23 of those frames glow with electric blue LED light, making the crossing feel like stepping into another world. The trail is open 24/7 and free to access, with blue lights running nightly from dusk until midnight (April–October) or 9 p.m. (November–March).
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Harmon Tunnel at Pammel State Park
The Harmon Tunnel is Iowa's only auto tunnel — a 150-foot passage hand-dug through a solid limestone ridge in 1858 as a mill-water chute, later widened for cars, where you actually drive your vehicle through the dark heart of the Devil's Backbone. The tunnel is still the primary road into the rest of Pammel State Park, so every visitor passes through it.
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Clark Tower
Clark Tower is a genuine 25-foot limestone castle-tower built in 1926, reached by a one-way, one-lane gravel road winding a mile through Winterset City Park — you climb the spiral exterior steps and a steep interior metal staircase to a rooftop overlook above the Middle River Valley that most park visitors never find. It survived a direct hit from an EF4 tornado in March 2022, which somehow makes it even more dramatic.
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Briar Patch Amphitheater
A Deadhead who followed the Grateful Dead through 80+ shows came home to rural Iowa and carved a natural-bowl amphitheater into an oak-hickory forested hillside — that's Briar Patch, tucked between wetlands and prairie just outside the tiny town of Bevington. Owner Bob Rice built it himself starting in 2000, and the programming reads like his music diary: annual "Jerry Daze" Grateful Dead tribute weekends, Bevington Bluegrass Festival, and now a 750-cap deep-dubstep blowout called Wubstock running a Void Acoustics rig. Axios Des Moines' own headline called it "Des Moines' hidden rural music venue," and that's underselling it — most locals have never heard of it. On-site forest camping seals the deal.
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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.
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Dome After Dark at Greater Des Moines Botanical Garden
On winter Friday evenings, the Botanical Garden's geodesic-dome conservatory stays open after hours with the tropical plants and Gardeners Show House dramatically illuminated. Strolling a glowing jungle under glass while it's freezing outside makes for a surreal seasonal escape. You can add a heated private igloo or a three-course dinner at the on-site Flora restaurant.
Weird outdoor & roadside things to do in Des Moines — FAQ
Which weird outdoor & roadside oddities in Des Moines are the strangest?
Ranked by how strange they actually are: South Des Moines Sculpture Park, High Trestle Trail Bridge and Clark Tower. South Des Moines Sculpture Park — A self-built roadside art environment that locals call 'a poor man's Pappajohn's' — about 18 homemade sculptures including a 30-foot egg-shaped UFO with a smoke machine hidden in an old outhouse, a steel pyramid, and a 300-pound 'world's largest functioning paperclip.' Phil Barber and Chuck Mettler reclaimed a swampy illegal-dumping lot across from Barber's house and turned it into this oddball public park.
Where in Des Moines are they?
Across McKinley Park (south side), Madrid, Winterset, Bevington (25 min south of Des Moines) and West Bend and 1 more. Each listing gives the neighborhood and address so you can cluster a couple into one outing.
Are any of the weird outdoor & roadside oddities in Des Moines free?
Yes — 5 are free to visit, including South Des Moines Sculpture Park, Harmon Tunnel at Pammel State Park and Clark Tower. The rest are mostly low-cost.
Is this a good weird date in Des Moines?
That's what the list is built for. Every entry has a specific move rather than a vague recommendation — at South Des Moines Sculpture Park, for instance: Wander the narrow strip at dusk hunting for the weirdest piece (the UFO and giant paperclip are crowd favorites), then come back for the free September art festival when smoke machines fire up the UFO to a 'War of the Worlds' soundtrack.
How were these weird outdoor & roadside oddities chosen?
An agentic research system digs for the genuinely obscure — the spots even locals miss — and every one is verified against real sources before it makes the list. We deliberately skip the landmarks already on every Des Moines guide.