New Mexico State Penitentiary, the site of gruesome riots. It was a ice cold day and visiting and walking around it was one of the most creepy and haunted feelings I’ve ever experienced.
From wiki –
In 1980, Cell Block 4, “the main unit”, was the scene of one of the most violent prison riots in the correctional history of America. Over two days 33 inmates were killed and 12 officers were held hostage by prisoners who had escaped from cell blocks in the main unit. Men were brutally butchered, dismembered, and decapitated and hung up on the cells and burned alive.