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

The museum moved on, but the diorama remain.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

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

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

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

This abandoned factory on the Hudson River once churned out a million bricks a week.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

An abandoned asylum where patients have been forgotten but their possessions remain.

This factory made "health corsets" that were a step towards liberating women's bodies.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

The ghostly remains of what was once the world's richest copper mine.

The ruins of the suspension bridge hang over Kingsbury Run as a ghost of racial prejudice.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

During WWII the U.S. Navy conducted primitive drone strikes on this Lake Michigan lighthouse.

A recently abandoned psych ward at the end of Sanatorium Road.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

An abandoned Depression-era zoo hidden just off the highway.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.