Ray Bradbury once wrote about an indoor dreamworld, the sun dome -- a giant spa and cafeteria centered around one giant, burning star.
We can't say we've tracked down any of those -- yet! -- but there are equally creative indoor destinations across the world.
Here are some of the world's other notable "inside-out" attractions. See the full slideshow at cntraveler.com.
--Hannah Serena Goldstein, Condé Nast Traveler
Adventuredome at Circus Circus Hotel and Casino, Las Vegas NV Rapid motion and glass don't mix -- except in Vegas, where crazy ideas always seem to work out for the best. Case in point: this geodesic dome's Canyon Blaster -- the world's only indoor double-corkscrew/double-loop roller coaster. Fearless visitors can also test their stomachs on the spinning Disk'O, a tower-drop ride called the Sling Shot and an indoor bungee fall.
"Rainforests of the World" Exhibit at California Academy of Sciences, San Francisco Chirping birds, small reptiles and butterflies are no longer the sad sounds of your Tropical Symphonies CD: Thanks to innovative biologists, California has its own rainforest -- or four. Inside this glass sphere, you can ascend a spiral walkway through Borneo on the first floor, Madagascar on the next and Costa Rica in the canopy.
Desert Dome at the Henry Doorly Zoo, Omaha NE Simulating the lighting, climate and geological conditions of three desert environments is no easy feat, but Omaha's engineers have done it. The 1,760 panels of the geodesic dome that covers re-creations of Africa's Namib, Australia's Red Center and the U.S.'s Sonoran were specially tinted to create the most sunlight possible in the winter and the most shade in the summer.
The Eden Project, Cornwall, England The covered portion of the Eden Project is the world's largest indoor park. Spread throughout eight domes, the complex is home to a rainforest and waterfall with a hot air balloon; a Mediterranean biome with a citrus grove; indoor gardens; an education center; and, in the winter, an ice rink.
Nickelodeon Universe Indoor Theme Park at the Mall of America, Bloomington MN It's an amusement park. Inside a mall. There's something so wrong about this -- and yet, to no one's surprise, it's hugely popular.
SkyVenture/Paraclete locations, international Skydiving is a relative term: If you're free-falling and it's extremely windy, why shouldn't that count? At SkyVenture's 23 international wind tunnel locations, it does. You can skydive on a vertical wind column of up to 16.4 feet at speeds of up to 160 miles per hour, depending on the location. A technician operates the control panel, and an instructor accompanies divers into the flight chamber to ensure a positive -- and authentic -- flight experience.
City Museum, St. Louis MO If M.C. Escher and Lewis Carroll collaborated on a design project, this is what it would look like: The 10-story slide is part of the "Shoe Shafts" exhibit, which builds off the museum's history as a shoe factory with this spiral as its former delivery chute. There's even a (very active) 1924 Wurlitzer organ below the slide whose pipes rise to three stories; that's as surreal as it gets.
Madrid SnowZone at Madrid Xanadu, Madrid, Spain Everyone loves to complain when climate change or bad weather interferes with skiing conditions. That's a nonissue here, where snow guns manufacture powder at a prime 28.4 degrees -- and there's no variable weather to mess it up.
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This article originally appeared on Condé Nast Traveler: Indoor Attractions: 8 Outdoor Activities You Wouldn't Expect to Find Inside
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