Are you looking for a great Halloween attraction? Check out terror Behind the Walls at Eastern State Penitentiary in Philadelphia! i went Saturday night with my girlfriend and another couple. It was scary and fun! You can make it more interactive if you opt in and wear a necklace that is lit up. It tells the cast of scary individuals working the attraction that they can grab you and take you down scary hallways. I saw lots of necklaces Saturday night! Have fun!