A wall of chewing gum moonlights as collective art.

A colorful architectural gem in Seattle's uniquely modern Central Library.

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

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

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

This floating sculpture of ice is a poignant reminder of nature's power.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A classically trained chef makes beloved burritos inside a gas station.

A cake-themed art installation tucked away in historic Chinatown.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Mai Tais and Navy Grog served up in one of the original tiki bars.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

This is one really big nut.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

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

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.