What was once a unique system of urban elevators is turning into a mechanical ruin.

Washington's iconic carousel has a nice piece of Civil Rights history.

Perhaps the most scandalous statue of America's first president.

There’s a hidden military meme engraved on the World War II Memorial.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

The South's nickname was supposedly born at a former bank in New Orleans' French Quarter.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A man-made island in scenic San Francisco Bay.

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Yo, Adrian!

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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

The rogue roots are gradually consuming some of the historic marble grave markers.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This structure among the trees was the result of divine inspiration.