I vaguely remember a movie i saw on tv maybe around 2008ish. The movie could have come out before then though. I remember it was about a small group of friends who wanted to explore some tunnels in what i belive to be a desert setting. Once down there their tour guide was killed be something(a spirit maybe?). They became lost and had to find their way out, a few dying in the process. They found a hatch that lead them to some sort of shack in the middle of the desert. I don’t remember anything else. I have tried for years to find this movie and Google cannot help me.