I've only been to the one in Toms River, NJ. That's not original, but it at least looks castleish.
https://www.google.com/maps/@39.9636...7i13312!8i6656
I took the teenager there the summer Harold and Kumar was released. He asked for a Crave Case to share with his friends. He was the man for a few days.
There's still no White Castle in Cherry Hill or near the turnpike exit in Mount Laurel. That location would have done well.