Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The United States Capitol's former columns still stand.

This grand gothic brewery has been pumping out suds for over a hundred years.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Some locals believe the fabled lost gold of General Yamashida is hiding somewhere beneath the city.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

These abandoned waterworks are crumbling into the Potomac River.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Despite its name, this route in southern Utah offers a heavenly day trip.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Legends surround this jagged rock formation in the New Mexico desert.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.