Unusual museums in Denver

Looking for unusual museums & collections in Denver? These 16 are the genuinely strange ones — Black American West Museum & Heritage Center, Dikeou Collection Pop-Up: Colfax, NSF Ice Core Facility and more — each hand-vetted and sourced, not pulled from a top-ten list. Great for an unusual date, a weird afternoon, or showing a visitor the side of Denver they'd never find on their own.

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Black American West Museum & Heritage Center Tucked into a Victorian on California Street is the museum almost nobody tells you about: it argues that one… Five Points
Dikeou Collection Pop-Up: Colfax From the sidewalk it reads as a shuttered old record store on a gritty stretch of Colfax — which is exactly w… Downtown / Colfax
NSF Ice Core Facility On the Denver Federal Center in Lakewood, behind unremarkable government doors, sits a walk-in freezer kept a… Lakewood (Denver Federal Center)
Dikeou Collection (Pop-Up: Colfax) Two Denver siblings, Devon and Pany Dikeou, have quietly built a 45-artist international contemporary collect… Downtown Denver / East Colfax
Cussler Museum Adventure novelist Clive Cussler (Dirk Pitt, 'Raise the Titanic') spent decades quietly hoarding rare automob… Arvada
Forney Museum of Transportation A 70,000-square-foot warehouse on a forgettable industrial stretch of Brighton Blvd holds 800-plus vehicles,… North Denver (Brighton Blvd, RiNo-adjacent)
Denver Museum of Miniatures, Dolls & Toys The cutesy name undersells it: this is a serious collection of 20,000+ objects dating back to the 1680s, cram… Lakewood
The Sexploratorium Two former Red Rocks Community College professors (one taught human sexuality, the other erotic literature) b… South Broadway
National Eagle Repository Inside the Rocky Mountain Arsenal National Wildlife Refuge sits a nondescript federal building that is the on… Commerce City
Georgetown Energy Museum Tucked at the end of a Georgetown side street sits a hydroelectric plant that's been spinning since 1900 and… Georgetown
Hamill House Museum Everyone photographs the silver baron's restored Victorian mansion; almost no one clocks the real story out b… Georgetown
Hiwan Heritage Park & Museum (Hiwan Homestead) Tucked in an old-growth ponderosa grove off a quiet Evergreen street is a 25-room log lodge that grew like a… Evergreen
Cherokee Ranch & Castle A genuine 15th-century-style Scottish stone castle rising from the Colorado prairie, Cherokee Ranch & Castle… Sedalia
Old Firehouse Museum This genuine one-room 1910 firehouse — credibly claimed to be the world's smallest museum — spent 24 years hi… Niwot
Little Thompson Observatory The Little Thompson Observatory is a fully volunteer-run public observatory on the Berthoud High School campu… Berthoud
Underhill Museum The Underhill Museum preserves the Victorian home and office of Dr. James Underhill — a mining engineer and U… Idaho Springs