An unassuming secret door once led to a legendary watering hole.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

A strange anthropomorphic stele with a mysterious inscription that has never been deciphered.

Wander among the abandoned ruins of this once-powerful medieval town.

A 1920s speakeasy that had rum runners racing up and down the shores of California.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

Location of the most powerful laser in the world, and the potential birthplace of tiny stars.

One of the best absinthe distilleries in the United States.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

The world's most famous donkey lives in this pen.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

The garage at the childhood home of Steve Jobs was a hangout for the founders of Apple, even if they never built computers there.

From the Difference Engine to the Cray-1, all under one roof.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

If you are looking for a used Russian battery, Chinese Ham Radio or other electronic oddities this Flea Market is a good place to start.

Collective dedicated to restoring steam engines.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.