This has been driving me crazy for the past few days and I can't seem to figure out the name of this movie. I remember watching this horror film back in the late 80's/early 90's about a teacher/professor who takes his class on an overnight field trip to an old house, or possibly an old castle to study either urban legends or cults (or something like that). Anyway, things get weird and people start buying the farm. But thats about all I can remember. I know, not much to go on, but I have faith someone will be able to name it.