Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

One of the world's longest murals depicts the history of diversity in Los Angeles.

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

The final resting place of a space program monolith.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A common entry point to the Griffith Observatory trail holds its own wonders.

A giant donut stands as a popular symbol of Los Angeles iconography.

Outposts of this restaurant chain were shaped like jaunty chapeaus.

This glamorous old building is said to have inspired the Tower of Terror.

Dozens of feral felines rule a segment of Hollywood's only graveyard.

Resting place of Hollywood's immortals is also site of summer film screenings.

"The greatest unknown literary treasure in Los Angeles."

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

This grand mansion has starred in everything from Bones to Buffy.

The private clubhouse for the members of the Academy of Magical Arts.

A long-vacant Scottish Rite temple in Hollywood has been converted into an art museum filled with Masonic relics.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

Iconic Los Angeles residence famous for its 19 statues of Michelangelo's David.

Nancy Thompson's Home from "A Nightmare on Elm Street."

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.