This historic Rhode Island mini-cemetery features a number of headstones run through with mysterious holes.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Lie in a hammock where George Washington stood.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

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.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The resting place of a Civil War celebrity's amputated limb.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

One of the world's largest model railroads is a mind-boggling achievement.

A true roadside icon standing on the same plains that the herds once roamed.

Three legendary, living albino buffalo roaming their pastures for all to see.

One man's quest to save his town with a trail of record-breaking sculptures.

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