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

A toxic ghost town sitting atop a massive coal fire.

World's first "penitentiary," meant to be humane, drove men insane.

An institution that preserves the history of institutionalization.

This frequently-photographed waterfall takes only a short hike to visit.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

An abandoned asylum incorporated into a college campus.

Where beautiful signs live on forever.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

Burial site more than 300 years old.

This research center for rare prosimians is studying how they sleep to help prolong human life.

Jule Körner's house full of bizarre architectural details.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

Hear the tales of New York's most notorious criminals.

New York City's only preserved family home from the 19th century.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.