Walk the whole Mississippi River!

A large instrument played by the wind.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Yugoslavia's biggest underground airport lies in ruins.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

Unlike most arches, this geological oddity formed in a volcanic dike.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

The highest bridge in America was built for an almost unnervingly small amount of money.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A 140-year-old castle with underground caves hidden in San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A house built from trash known as the poor man's Hearst Castle.

Wheels of chrome by the thousands adorn this California Historical Landmark.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A grove of "candelabra redwoods" deep in California's Lost Coast.

This massive redwood tree has a hole in the base big enough to drive through.