Wolf Creek (2005)
Wolf Creek is a 2005 independent Australian horror film written, co-produced and directed by Greg McLean, and starring John Jarratt, Cassandra Magrath, and Kestie Morassi. The story revolves around three backpackers who find themselves held captive and subsequently hunted by a serial killer in the Australian outback. The film was ambiguously marketed as being "based on true events"; the plot bore elements similar to the real-life crimes of Ivan Milat and the 2001 murder of Peter Falconio.
More at Wikipedia.