This quirky hot springs town known to locals as "T or C" was named after a radio show.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

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

The highest point in Texas is capped by a big silver pyramid.

Steep canyon walls hide a forested oasis in the West Texas desert.

Catch two 18-foot-tall ranchers mid-brawl as you drive by on Highway 285.

This highest peak in New Mexico is named after an explorer who had a habit of lending his moniker to peaks.

The largest self-built castle in the U.S., six decades in the making.

A short tunnel built straight through a magmatic dike.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

A floating cat sanctuary on an Amsterdam canal.

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

The shattered remnants of a meteor that struck Santa Fe more than a billion years ago.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A frozen oasis lies beneath the scorching New Mexico desert.

Once a black market electronics marketplace, now an otaku shopper's paradise.

An LED art installation composed of 600 poles wrapped in kimono fabric.

A beautiful bamboo trail tucked in this famous Japanese shrine.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Hot springs monkey spa in the middle of Hell's Valley.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

This museum showcases the art of ancient sword-making.