From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.

This century-old roadside attraction is full of bizarre rock formations.

This mountaintop refuge rehabilitates tigers, lions, bears, and more from illicit wildlife trade—and offers overnight lodging.

One of the oldest show caves in Arkansas.

These springs were once the source of a tourism boom to Sulphur Springs.

Hundreds of fiberglass structures line the side of the road in the middle of nowhere.

Cute manhole covers commemorate the hometown of the real-life Ash Ketchum who created Pokémon.

The largest protected conservation area in the Ozarks—a region that stretches into northern Arkansas and southern Missouri.

A likeness of Da Vinci's mysterious painting smiles at passersby from the side of a barn.

A Jurassic artscape composed of transmission casings and other mechanical parts.

This unusual sculpture honors the city's namesake, Octave Chanute, for his pioneering work in early aviation.

This historical marker is all that remains of Octagon City, Kansas, a failed vegetarian utopia.

Don't pass Gas, stop and enjoy it.

It's hip to be square in Iola, home of the largest town square in the United States.

Its look is severe, but its location, isolated on a hill in the middle of the countryside, is particularly scenic.

Though they look like Hobbit houses, these semi-underground stone structures were built for winemaking.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Ride a boat through this magnificent underground world, which now doubles as a theater.

The only visible remains of this ancient Greek underground temple is its roof protruding from the earth.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

According to legend, this small island was home to one of the sirens met by Ulysses in the Odyssey.

This ancient city was home to one of the greatest schools of Greek philosophy.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.