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

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

An eccentric playboy's astounding natural history collection.

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

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

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

The loneliest island in New York.

A beautiful, historic location open to the public.

Astonishing collection of helmets, scientific instruments, and medical models.

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

This mouldering abandoned mental hospital was once a center for progressive healing.

"A hideous albatross in the Hudson River Valley."

An unassuming island in the middle of the Hudson that hosts campers, including Aleister Crowley.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

A nearly 100-year-old dining car in upstate New York embodies the golden age of roadside dining.

The former residence of Elizabeth “Mumbet” Freeman, an enslaved African-American woman who successfully sued for her freedom.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

Journey through vintage Americana inside this small Massachusetts shop.

The Hudson River School comes alive at this palatial estate.

A small Second Empire-style building is one of only seven remaining lighthouses on the Hudson River.

Three acres of mythology-inspired sculptures are visible from the highway.

At this farm in upstate New York, the former president plotted his reelection campaign.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.