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En español | Leggett, Calif.
This environmentalist's nightmare features a roughly six-foot-wide opening that was carved into the base of a massive redwood tree in the 1930s, allowing you to cruise on through — though you might want to measure your behemoth SUV first. The tree is one of several similar attractions in the redwood forests of Northern California.
America's answer to Stonehenge is a line of 10 Cadillacs, circa 1949 to 1963, planted nose-first in a field alongside Interstate 40 at the same angle as the Great Pyramid at Giza. An artists' collective called the Ant Farm created Cadillac Ranch in 1974. Is it art? No matter — it's a hoot.
It's almost beside the point that the Corn Palace is actually a multipurpose arena. The draw here is the circa 1921 fantasy architecture straight out of The Arabian Nights that's adorned with huge murals made from 275,000-plus ears of multicolored corn. It's "corny" in both senses of the word.
John Elk III/Alamy
A group of humans — dubbed "Biosphereans" — once occupied this 3.14-acre greenhouse, which was built between 1987 and 1991 to simulate the hermetically sealed conditions of space colonization. The last residents left in 1994, and now you can tour the futuristic glass structures that still house a rain forest and coral reef.
Holly Springs, Miss.
Paul MacLeod calls himself "the biggest Elvis fan in the universe," and you may agree after seeing his house. Surrounded by blue Christmas trees and open to the public 24/7, it's full of Elvis memorabilia — including the King's famous grade school report card with an F in music.
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Cave City, Ky.
This unique motel consists of 15 concrete-and-steel teepees, each with a bedroom and bath. It's one of three remaining Wigwam Villages out of seven built around America beginning in 1935. Even if you don't stay here, take a spin around the kitsch-filled gift shop housed in a giant teepee.
Des Plaines, Ill.
At this re-creation of Ray Kroc's first McDonald's outlet, which opened in Des Plaines in 1955, the cooking equipment dates from the company's early days, when fries came from fresh potatoes and not a freezer. The museum has no real restaurant, but there's a modern McDonald's across the street.
Tim Boyle/Getty Images
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MORE ROADSIDE ATTRACTIONS: Artist John Cerney’s gallery is the great outdoors, where he creates commercial art that adorns farm fields throughout California’s fertile Salinas Valley and beyond.
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