The only castle in North America to ever house European sovereigns.

Stained glass windows bathe this botanical garden in cosmic light.

Oldest building in California still in use.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

A popular tourist cave with a dark past.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

Colorado Boulevard’s historic bookstore, operating since the bustling city of Pasadena was merely some orange groves and a few ostrich farms.

World-famous, Pink's still manages to keep its prized cult fetish status.

Historic funicular railway, believed to be the shortest railroad in the world.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A small, peaceful sculpture garden with a grim memorial to a disaster that took place a few blocks away.

The highest point in Washington state is a volcano covered in glaciers.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

An extensive collection of ancient Egyptian artifacts and mummies.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

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

An old California photo stand has been turned into a shrine to the cozy art of crochet.

San Francisco's newly reopened hands-on science museum.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

An entire town preserved as a historic landmark.