A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Hidden on two floors of downtown building, the library has an incredible deal on rent.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

A real flying saucer, contracted by the U.S. Air Force.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Rare recess caves fill this unbelievably beautiful Ohio park.

The largest earthwork effigy in the world.

Take a drunken tour inside the world's largest known geode.

One of the most comprehensive collections of historic Native American culture in the country reframes artifacts as artwork.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

The wooden airship was the largest flying boat ever built.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.