A cave's rare beauty held a cavernous secret hidden underground.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

This is one really big nut.

See massive fossils that are over 200 million years old in northeastern Arizona.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

For those going through a life transition, a place to leave behind a piece of your former self.

A Wild West jailhouse that slid down the mountainside.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

A spiritual vortex among the red rocks in Sedona.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

An homage to everyone's favorite prehistoric cartoon family.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

A massive sustainable farm designed by the mastermind behind Central Park.

This rare polygonal meeting house is rumored to be built in a circle so that the devil has nowhere to hide.

A pair of black granite tails dive into a sea of grass in landlocked Vermont.

Stand at the center of this lakefront sundial, and you'll become part of the timepiece.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Cryptid lake monster honored with its own monument.

Scary metal statues adorn some of the signature buildings of Burlington, Vermont.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.