This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A once grand hotel is being retaken by the wilderness it once capitalized on.

This abandoned subway station can still be seen on regular commuter trips.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

The remains of what was once the world's steepest passenger funicular.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

A crumbling hospital from the 1850s on Roosevelt Island.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

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

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

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

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

This one-room cabin where the young colonel slept during the French and Indian War.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.