A ring of creosote bushes that are estimated to be 11,700 years old.

Where decommissioned airplanes and helicopters go to become part of Hollywood.

In the days before HD projectors and IMAX, some of the most powerful projectors belonged to planetariums.

Abandoned Air Force base that has fallen into disrepair.

This eatery transports diners to a place that no longer exists: East Germany.

An invitation-only museum of items natural and bizarre, arcane and exotic.

This shop specializes in oddities and Victorian-inspired wonders.

A winding path built in secret on the edge of the continent.

This sailor's boneyard was lost under a parking lot for decades before being rediscovered.

Built in 1906, this unique building was the first Hindu temple in the United States.

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

A former hardware store near Yerba Buena is the official home of California's history.

A modest reminder of treacherous waters at the Golden Gate.

America's oldest Italian restaurant is a San Francisco institution.

Guns that have been defending San Francisco since 1904.

Radioactivity still cause for concern at this urban explorer's paradise.

Russian history in San Francisco.

A promotional sun clock on the site of San Francisco's great raceway.

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

Over 315,000 preserved amphibians and reptiles in jars.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

The restored and active Victorian-era final resting place of San Francisco.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.