Anybody Know The Name Of This Movie?

I saw this movie when I was about 11 on cartoon network. I don't remember much about it but i do know it was anime, something about a little girl lost in this weird city, and she starts out with her parents at this river that had broken temples around it and i believe that's where she gets lost. Um weird animal/monster things were in this city scared her she really wanted to get out trying to find someone to help her. Don't remember much else about it but i loved this movie and would really

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