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

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

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

Once a farm where patients tilled the soil, this asylum lost its workforce when overmedicating became common practice.

Underground tunnels remain beneath this abandoned mental asylum.

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

Dilapidated ruins that once treated a notorious young serial killer, currently hosting vandals, squatters, and ghost hunters.

A long abandoned hospital building on the outskirts of NYC.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.