This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

San Francisco’s condensed garden of incredible plant growth.

One of California's oldest continually used high schools has an interesting history, both on and off screen.

The first safe in this California town had to hold all the gold.

One of the largest Buddhist communities in the West sits on the site of an old hospital.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

A remote crossroads honoring a fallen talent.

This municipal playground was co-created by the father of one of the most playful characters ever.

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

A lighthouse built to save lives that took quite a few with its treacherous location.

More than 700 species live within this murky marvel of a swamp on California's coast.

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

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Eat a tasty meal in the house where John Steinbeck was born.

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

One of the largest trees of its kind in California.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

A miniature view of the park, caught in time.

The classic Atari game's iconic aliens have invaded downtown San Diego.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

One of the most elaborate displays of Jellyfish is on display at the aquarium.