A sliver of nostalgia in Seattle's Viretta Park.

Despite a recent paint job, the factory still sits empty.

A hidden beach at the end of a tunnel of mangrove trees.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

A deserted hodgepodge of experimental structures designed by nearby university students.

Two massive rock outcroppings on the Oregon coastline.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

A monument celebrating the idea of reaching inaccessible places.

An exotic wildlife habitat right off The Strip.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

An urban laboratory.

Miniature art that tells an enormous story.

Nancy Thompson's Home from "A Nightmare on Elm Street."

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

Lucha Libre (Mexican Wrestling) themed taco shop.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This massive redwood tree has a hole in the base big enough to drive through.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

The "Seinfeld" diner.