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

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

Series of storm drains connected to a dark urban legend.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

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

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

This abandoned ironworks was once the most important military supplier in America.

Reforestation in action is the main attraction in this abandoned quarry.

The largest known open fault in the United States is basically a giant natural refrigerator.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.