A popular tourist cave with a dark past.

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

Megachurch turned Catholic church comprised of 10,000 glass panes.

A large instrument played by the wind.

An optical illusion found amid a logged redwood forest.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

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

One of the last free public hot springs is decorated with hippie art.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Commonly referred to as the most photographed Victorian home in the United States.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

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

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

An inconspicuous footbridge beloved by San Diego locals.

The unbelievably opulent home built for an infamous newspaperman.

Everyone remembers Laurie Strode from Halloween, but this is the house where most of the blood was shed.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.

One of the most unusual geological features, recognizable from a dozen hit movies.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Lucha Libre (Mexican Wrestling) themed taco shop.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.