Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

This statue honors a pillar of the early New Haven Black community.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

The quarry was abandoned over 100 years ago, after a massive ammunition explosion ended in tragedy.

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

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.

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

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

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

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

A former copper mine which became a truly unsuccessful prison.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

This mysterious artificial cave has long puzzled New Englanders.

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

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

This unusual three-way wooden foot bridge spans two rivers at once.

An abandoned stretch of highway, deteriorating next to the operational one.