The surroundings look like an enormous grotto. In the middle lies a woman with her arms spread on a huge flat stone. The stone has a cavaty in the shape of her body. A matching stone hoovers above her, hanging in ropes from wooden cranes. It is slowly lowered to bury her alive as a huge stone sandwich. Ofcourse at that moment the hero enters the scene to rescue her. Any idea which movie this is from? I think it must have been an SF, adventure or fantasy movie from before 2000.