A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The absurd creation is a compulsory destination for selfies in Buffalo.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

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

Avoid gangster interaction while window-shopping.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Visit the monolithic tomb of America's most famous general.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Plot your trip through the city on the sidewalk.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

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

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

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

This collection of grinning ephemera has grown from basement to Brooklyn.

Wine bottle sculpture with a ship's stateroom inside.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.