I grew up in NJ, where, being one of the oldest settled places in the US, creepy stuff can be found everywhere. I'll share a couple of my favorite creepy things.
Morristown NJ is home to one of the oldest courthouses in the country and, as my mother used to work in a nearby social services office, I used to frequent the place often. I particularly liked to go see the dinosaur footprints on one of the building's steps. Made of natural slate, one of the staircases has (or had) a set of actual dinosaur tracks that, because of the arrangement of steps, looked like the dinosaur had walked right up into the building.
But the creepy thing about the courthouse is what it used to keep in the attic and the weird story associated with it. Up there was one of the first 'high-tech prefab' gallows ever invented. It was designed to be stored away and rapidly deployed whenever a public hanging was called for. Its most famous use was in the execution of the colonies' first mass murderer, a fellow named Antoine la Blanc. Convicted of murdering an entire family he had once worked for, he was sentenced to public execution which, at the time, was quite a public spectacle. But that's not the creepy part. A local physician decided he would buy la Blanc's corpse after execution in order to flay and tan his skin to make into wallets and purses to sell as souvenirs commemorating the event. One of these wallets still exists and, along with la Blanc's death mask, is still in the possession of the Morristown police department.
http://en.wikipedia.org/wiki/Antoine_le_Blanc
Another story relates to one of my favorite shows as a kid; the Uncle Floyd Show. I've always been a fan of DIY TV. Shows on Public Access TV like Rapid T. Rabbit and Biker Billy Cooks With Fire. The Uncle Floyd Show was one of best to come out of NJ public access TV and featured some early legends like The Ramones and R. Stevie Moore. Floyd Vivano started the show and is famous for his song Deep In The Heart of Jersey and the Wild West City theme song that featured in ads for that old NJ theme park.
Screw-ups and accidents are a common part of DIY TV--and part of the fun--and The Uncle Floyd Show was no exception. But, while watching the show, I noticed that every once in a while there would be some crashing sound in the background, something would break or fail, or the transmitter would act up and Uncle Floyd or one of the other studio crew members would exclaim; "Hello Mary!" or "Hey there Mary!"
It wasn't until many years later that I learned who this Mary was. It seems that the building they used as a studio for that local TV station was a small house in West Orange NJ that had once been moved whole to the top of Eagle Rock Mountain to be used as a studio near the station radio transmitter. The house was originally owned by a woman--supposedly named Mary--who was found horribly murdered, her head cut off and stuffed up a chimney. In typical NJ fashion, local authorities ruled the death a 'suicide'. No one was interested in living in a house that had been the site of such a horrible murder and it sat empty until finally being bought and moved whole to become a public access TV studio. And so the 'Mary' the Uncle Floyd Show crew were referring to was this murdered woman's ghost who would, purportedly, make her presence known by occasionally messing around with things in the studio.