An eccentric inventor's castle home with its own indoor weather system.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

100 year tradition of fist fights, marked by marble footsteps.

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Ever wanted to can Spam?

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

Daily jousts and dancing barrel makers in Munich's mechanical clock.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

The bears of Bern have been a city highlight for over 500 years.

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

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

The first American department store, and home to the largest operating musical instrument in the world.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A fitting attraction for the corn capital of the world.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

A beautiful geyser under environmental threat.

The largest earthwork effigy in the world.