An urban laboratory.

See massive fossils that are over 200 million years old in northeastern Arizona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Step inside Lucy, the world's largest "elephant."

Site of a former hidden treehouse in New Orleans.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A museum and shop on Bourbon Street located in the French Quarter.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

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

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

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

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

San Francisco's most expensive hotel suite includes a secret passageway rumored to have been used by JFK.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

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