What is this movie? (WARNING: vague details)

I saw this movie when I was younger, but have not seen it anywhere else since. The details are vague, but here is what I can remember of it.

The movie starts out with a girl who I think was sick, so her parents took her to a hospital. She got scared so she ran away, and came to a lake. I think she climbed aboard a wooden raft and when she woke she was in this “strange world”. I believe she then eats something off a tree that she sees when she goes ashore, but it soon turns out that she has angered someone/something for doing that. I remember another scene where she is chased down a stone tunnel and slams the door shut behind her. In the room where she is now in she finds something which needs a key to operate it, and she uses a dusty key to “unlock” this thing.

At the end of the movie, she is in a room with what I think were pieces of jewelry or maybe cups, and she has to choose 3 cups. 3 of the cups are actually three of her friends that she met on her travels (who had been turned in to cups. I THINK they were cups. But I may be getting this confused with Indiana Jones and the Last Crusade).

So, can anyone make sense of my ramblings? More importantly, does anyone know what movie this is?

Labyrinth? [sp] With David Bowie?

Nup, ain’t that.

In my OP I mention the bit about the dusty key, it is actually more of a “spider web covered” key.

And the door that she slams herself behind is at the end of the tunnel.

Return to Oz?
http://us.imdb.com/Title?0089908

Maybe you could make our job easier if you would tell us what time period in history you are talking about? I haven’t a clue what decade ‘when I was younger’ refers to.

That’s the one!
WOOHOO!!!

Thanks dzray, if that is your real name.

No problemo!