What movie is this!I can't remember the name!let me brief you on it!It was about three children (sisters and brothers)and there are in a next world or dimension!There parents has gone missing and they arrive at some big hotel or mansion!They meet some really scary people and I think they have something to do with their parents missing!Eventually they found they parents covered in some kind of green slushy thing!I think they were past! (not dead)In the end I'm not sure what happened but what I can tell you is it is a really weird,horror,adventure movie that came out long ago when I was a kid!
Whats the name of it?
I hope you know the name!Please reply!

Thank You!