This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

This Orthodox Church's exterior is rather unorthodox.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The loneliest island in New York.

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

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

The remains of what was once the world's steepest passenger funicular.

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

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

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

The ceiling of this vintage movie palace is covered in fantastic Art Deco murals.

The oldest stone house in Paris was built by its most famous alchemist.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.

The divine septet of Japanese fortune gods are rendered in 1,000 year old wood at this peaceful site.

Open-air museum with an elaborate sculpture garden, stretching for over 70,000 square-meters.

This little known mountain has claimed four times as many lives as Everest.

This sawtooth mountain range still bears the strangely lovely marks of its history as a medieval quarry.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

School named after its beloved principal, killed in the cross-fire of a drug related shooting.

What’s a sure fire way to end up in jail in New York in the 1920s? Peddling bad moonshine.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.