Continuity mistake: Right near the end of the film, one of the characters is driving away from the caves and eventually pulls over onto a grass verge where she breaks down in tears. Seconds later, a lorry carrying logs drives past her sounding the horn. At this point, you can see that her vehicle is now on the road.
Continuity mistake: When the girls are crossing the first chasm over the huge drop, the first two girls make it to the other end safely using a wire. When the two girls are hooking up the third girl to come across, we can see four people stood behind her. There should only be three.