A castle built for love, and abandoned due to heartbreak.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

Salute the leader of the proletariat.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

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

The site of a tragic massacre that spawned a multimedia franchise.

This small, hidden cove is home to abandoned boats.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

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

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

Once America's longest-manned military fort, now an abandoned hulk.

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

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

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

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

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

The famous author's cottage hideaway.

A popular European tradition makes its way to the states on one of America's most famous bridges.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.