Which old horror movie is this?

Here is an interesting question with an interesting story behind it:

When I was a young child I had the unfortunate incident of viewing a
particularly scary horror movie with frightened me for several nights
thereafter. I have no idea when this movie was made or whether it made
it to theatre or was a lowly "B" flick. I saw this movie in the
mid-late eighties.

I have never been able to remember the name (I probably never knew it
to begin with), but I am able to recall a couple of scenes that may
allow a horror buff to help define its title. Please help if you can:

Rememberance #1: Part (or all) of the movie takes place at a building
(be it a residence or otherwise) in the middle of what I guess is a
forest. There are a group of characters trying to escape this place by
vehicle, but all of the roads mysteriously lead back to the building.
There's no way out!!!

Rememberance #2: In one scene, a woman (I think) is eating supper with
a group of other people when a large bone is lodged in her throat. She
is choking horribly and if I remember correctly, they vividly and
graphically cut her throat to allow her to breathe.

Rememberance #3: In another scene, someone is swimming in a pool and a
sheet of glass spreads across the surface, effectively drowning her.

These are the only bits that I can remember, so if you can help me
out, you'd be solving a question that has plagued me for YEARS!!!

Thanks!
-Nick.

>These are the only bits that I can remember, so if you can help me
>out, you'd be solving a question that has plagued me for YEARS!!!

This is an easy one, it's called "The Legacy." It stars Katherine Ross and Sam
Elliot i believe, and it's not a bad little film at all.

Maris