Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

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

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This Russian bar-restaurant lies within a three-story underground bathhouse.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

An accidentally hidden library containing the ephemeral history of New York.

Visit the site of a subway powered by nothing more than air--and lots of it.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

The cinder cone volcano with a less than complimentary name.

Most-visited and most-photographed slot canyon in the American Southwest.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Colorado's only true geyser is hidden within the San Juan National Forest.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.