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

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

Inside a state forest, the forgotten remains of a Cold War defensive installation.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

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

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

This historic railway museum may have lost its passengers but not its love for trains.

Ruins of a historic medical facility sits eerily by the water.

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

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Underground tunnels remain beneath this abandoned mental asylum.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

An overgrown and abandoned tuberculosis ward resides in the midst of a quaint modern neighborhood.