The walls of the iconic dome are hollow and have a secret stairway.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

World's first "penitentiary," meant to be humane, drove men insane.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Because there's no place like home.

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

Historic funicular railway, believed to be the shortest railroad in the world.

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

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

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

The legendary building that needed ghostly approval before being built.

World's largest collection of serial killer artwork and other macabre exhibits.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.