This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

European castle ruins in an American state park are actually the product of death and grief.

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

This crumbling little graveyard was saved from the undergrowth by concerned veterans.

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

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

A small Richmond island dotted with the remnants of hundreds of years of history.

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

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

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.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A mysterious castle built as a monument to lost love.

America's oldest archaeological site or a muddled case of wishful thinking.

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