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

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Stroll through a wonderland of stupendous moss-covered trees.

Make your reservation to have coffee with some kitties.

Largest collection of mounted dinosaur specimens in the world.

Dig for your own trilobites in this goldmine of invertebrates.

A Seattle oddities shop brimming with Victorian-era gems and antique curio.

A Boeing mechanic and his wife leave a whimsical, stone sculptured garden as their legacy.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

A museum dedicated to the history and exploration of both popular music and science fiction.

This quirky Arkansas wax museum does not shy away from the macabre and the grotesque.

The legend of a local monster still haunts this small town.

An ever-growing collection of rare and strange objects owned by local Arkansas illusionist Maxwell Blade.

The Ozarks' strangest dwelling.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

The only diamond mine in the world where you can keep what you find.