This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

Every last book in this bookstore is signed by the author.

A volcanic fissure over two miles long and up to 70 feet deep.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

A medieval castle in the middle of rural Texas.

A monument celebrating the idea of reaching inaccessible places.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

The first full-scale tunnel built in America is short but scenic.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

Twenty churches beautifully painted by 19th-century Czech and German immigrants in Texas.

There’s a hidden military meme engraved on the World War II Memorial.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This vast kitty-themed collection illustrates the history of human-cat interaction.

A retired tobacco farmer's pet project turned into a sturdy miniature city.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The mysterious round rocks of Schooner Gulch.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.