what is the name of this movie?

hi mylotters.. i want to know the name of the movie..i think its a animation movie not sure..some of the keywords of the movie name are girl,curse..the story is something like this.a family of three dad.mom and a girl while riding somewhere they see a old building..when they enter the building is very disgusting..but when they go deep the appearance of the building changes and there were lot of people living there..something like a different world.suddenly her parents were found missing..as time progress the people there change forms.one of the boy helps her find her parents and the way out,,whats the movie name..?i want to see it again..please tell me