This naturally-sourced hot spring is now home to a clothing-optional resort.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Olfactory delights in San Francisco's Botanical Gardens.

An underwater city for the dead.

Where manatees are the snowbird vacationers in these balmy Florida springs.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

Rainbow-hued local gem in Venice.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

A beautiful geyser under environmental threat.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The first declared National Monument in the United States.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

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.

The only theatre in the world constructed specifically for sound movement.