this film was late 80s or 90s. It was an American film (I think) it was in English. A young woman is searching for some kind of piece of jewellery that has some kind of religious significance? it’s a clue of some sort? To find it, she repeatedly dives into water inside of (if i remember correctly) a hotel that seems mostly abandoned. She seems to be alone in this hotel. There is not a lot of dialogue. I vaguely remember she is searching for her missing sister? but i could be mistaken. I think the film title begins with “The” . thanks in advance.