Travel Tuesday: What Have You Actually Learned About Salem Besides What's in "Hocus Pocus"?

We've all seen "Hocus Pocus" more times than we can count and probably had to read "The Crucible" in high school. Some of us have even visited the sites (and filming locations) ourselves, but since Salem, Mass. has become a hotbed for seasonal tourism, what have you actually learned about the historical town? If you're going to take a trip there, it may as well be in October, but let's see how up to snuff your history knowledge is first.