An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

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

Records of the dead describe the myriad odd ways people used to die.

A prohibition era watering hole for the police.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

World's largest herd of white deer populate a former U.S. Army depot.

This derelict building used to house infirm Freemasons, their widows, and orphans.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

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

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

This former crime corner has been turned into an eclectic community center.

Holding the most bodies of any cemetery in the United States.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

This locally-famous crevasse in New York State is icy all year round.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This was one of the first (and last) university-built and operated nuclear reactors.

Final resting place of two dozen New York City harbor ships.

A collection of unique outdoor sculptures surounded by the beauty of nature.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.