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

The palatial McDonald's that inspired Wesley Willis.

Orthodox church partially financed by Tsar Nicolas II.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

A speakeasy takes on Chicago's drinking culture.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

Sports history, made in the Arroyo Seco.

Explore the wide world of desert plants at this unique Palm Springs botanical garden.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

The blinking light atop the iconic landmark has been sending secret messages for decades.

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

A former utopian healing center created by a huckster and built by derelicts.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

This private residence was the template for one of the most beloved television homes of all time.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

An unexpected and peaceful oasis on a hillside.

Oldest building in California still in use.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The hidden jewel of Disneyland: a members only playground for the Disney elite.

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