Picnic at Hanging Rock (1975), directed by Peter Weir, is an Australian mystery film, set in Victoria at the turn of the century, adapted from the Joan Lindsay novel of the same name. The film opens at Appleyard College, a private girls school and relates the mysterious disappearance of a group of girls on a picnic excursion to a local geological and former Aboriginal settlement, on St. Valentine's Day in 1900. The film explores the subsequent effect this has on the small-knit community.
If you're into the eerie and the mysterious, with the addition of beautiful girls floating about in Edwardian garb, then this might the one for you. Don't be tempted to pass it off at sheer whimsy, Weir has crafted a bewitched piece of cinematic history that will haunt you long after you've watched it. I've had friends comment on how discomforting they found it, and when you hear that pan pipe music, you might agree.