A real flying saucer, contracted by the U.S. Air Force.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

The first declared National Monument in the United States.

This rustic old building is said to be the most photographed barn in America.

At the time of its completion, it was the tallest dam in the world.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A smoke stack so large, the Washington Monument could fit inside!

Statue dedicated to the star of an old television show.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

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

A Barbary Coast watering hole built into a Gold Rush shipwreck.

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

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

This public art is inspired by a local Aboriginal creation story.

This church on a Tohono O'Odham reservation has stood since 1797.

Make a wish at what might be America's only Catholic shrine to a sinner.

Beautiful scenery provides the backdrop for an abandoned coastguard facility.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'