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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

Here, exhibits come with a side of edible history.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

A hidden "place of interment for gentlemen."

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

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

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

The first museum in the United States dedicated entirely to posters.

New York City's only radical feminist independent bookstore.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Plot your trip through the city on the sidewalk.

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

Lie in a hammock where George Washington stood.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

This subtle Berkeley paving stone actually marks off a lawless tube of air that extends into space.

This working replica of the 'Friends' coffee shop is more accurate to the show than the set itself.

This sprawling scenic burial ground is the final resting place of Japan's last shogun.

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.

The original "capsule building" is a masterpiece of Metabolist architecture.