The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

The remains of the first public diamond mine in Arkansas.

The strange and snarky traditions of the lumber industry's fraternal order began with five men waiting for a train here in Arkansas.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

The largest self-built castle in the U.S., six decades in the making.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

The remains of this hell for leather wild west town can still be found in the Arizona desert.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

A Wild West jailhouse that slid down the mountainside.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

Rippling sand dunes frozen in the Arizona rock.