Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A once grand hotel is being retaken by the wilderness it once capitalized on.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

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

A staggering collection of photographs depicting medical, social, and historical change.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

New York's oldest and possibly grandest keeper of books.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Become a prohibition rebel.

The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

A world-class collection of mechanical musical instruments and automata.

A unique sculpture park that specializes in the huge and bizarre.

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

The remains of a century-old mansion that met a fiery demise years after it was deserted.

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