These aggressively sustainable art homes look like something out of 1970's science fiction.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A wall of chewing gum moonlights as collective art.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

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

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Rustic natural hot springs in the deciduous rain forest.

A heavenly experience, right here on Terra Firma.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A modern day curiosity cabinet.

A beautiful geyser under environmental threat.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

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

Stroll through a wonderland of stupendous moss-covered trees.

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

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

Hollowed out cedar log tubs set in an ancient towering forest.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A giant Troll lurks under one of Seattle's oldest bridges.

The first declared National Monument in the United States.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Odd outsider art installations surround a Gold Rush-era ghost town.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.