Okay, so this is going to be really weird. I only saw a couple scenes of this movie, and I think they were the end. It must have been late 90s or early 2000s when I saw at, it was on TV, english, and in full color.

All I remember is there was this family, and they had to go into a cave to fight some strange entity that was threatening/trying to steal/possess their son (I don’t clearly remember which. The son was very young, maybe around five). At some point in this cave, they ended up in another grey, misty, windy-sounding, dimension (I think) with the weird entity, who manifested kind of human-like and maybe as a giant head. They managed to save their son in the end.

Sorry if this doesn’t make much sense, I was really little when I saw it, and don’t remember it very clearly.