The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

This abandoned factory on the Hudson River once churned out a million bricks a week.

The largest known open fault in the United States is basically a giant natural refrigerator.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

This mouldering abandoned mental hospital was once a center for progressive healing.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

An abandoned dollhouse factory.

One man's swirling six-acre monument of stone.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A small Second Empire-style building is one of only seven remaining lighthouses on the Hudson River.

Pick up a kebab and a credenza at this unique combination furniture store and café.

An unexpected canine grave atop a mountain.

The monument dedicated to Phineas Gage in the town where his accident happened.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A monument to the Mohawk people stands along an old Native American trade route.

A mysterious collection of stones stand outside a small New England town.

This decrepit abandoned building is made all the more eerie by its dark history.

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

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.