Salem is a town in Massachusetts.
History
The Scooby-Doo Show
Season three
The gang are off to visit a friend, Arlene Wilcox, on Halloween night, in the town of Salem which is being haunted by a witch. The town suspects Arlene and sets out to get a confession from her.
The 13 Ghosts of Scooby-Doo
One of the "13 Ghost" cases took the gang to Salem. (Coast-To-Ghost)