The Graves

Megan and Abby happen on Skull City Mine, a weather-beaten, abandoned mine town converted into a self-guided tour. But Skull City harbors terrible, vexing secrets. Victims' souls are ripped from their bodies right before their eyes, and that's only the beginning. Abby must save her sister, but to do so, she must unlock the mystery of Skull City alone. Can Abby defeat the threats of Skull City and rescue Megan or are they doomed like all the other tourists before them? (imdb)