The Descent
A group of women—friends and frenemies—fond of daredevil adventures go spelunking in an unexplored cave system, only to find that relationship tensions and claustrophobia-inducing wrong turns are the least of their concerns once they get deep underground. Neil Marshall’s 2005 release takes a simple concept and makes all the right choices; the results will terrify you while you’re watching, and haunt you long after it ends.