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

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

A forgotten sea village stands silent after hurricanes deemed it obsolete.

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

When methane gas started seeping up from the ground, they picked up and moved the entire town.

Empty since 1989, now falling into ruin.

A strange house built only at night, with rumored mystic inspiration.

A crumbling cathedral condemned by an earthquake.

Asbestos pit mine abandoned in 1983 is still dangerous thirty years later.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

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

The decaying ruins of Wales' first asylum for the mentally ill.

A formerly abandoned mental institute, now back in business.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.

Villas that once served as playgrounds for the rich now fall away in decay.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

A crumbling hospital from the 1850s on Roosevelt Island.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

An abandoned castle owned and ignored by Masons carries a cursed history.

From scholastic to sepulchral - now under reconstruction.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.