Really all twelve of the ghosts (I know there are thirteen, but I don't want to spoil anything for anybody who has not seen it) are really well done and frightening. The house itself is jaw-dropping in its detail, and the special effects are really good for its time (2001). Some of the death scenes are gory, and the opening sequence sets a good mood for the rest of the movie. There is also a really cool nod to the original 13 Ghosts--in the original, to "see" the ghosts in the film audience members had to put on a pair of special glasses. In this one characters in the film itself could only see the ghosts if they were wearing special glasses. Thir13en Ghosts will never be considered a masterpiece of horror in anybody's book, but it is a movie I enjoy quite a bit and recommend highly.
On A Scale Of One To Ten: 8