Lake Mungo

Joel Anderson's 2008 Australian mockumentary is the sleeper that hardened horror fans whisper about. Presented as a documentary about a family grieving their drowned daughter, it slowly reveals layers of secrets, digital manipulation, and one cell phone video that delivers the most genuinely unsettling scare in modern horror. There's no gore, no monster, no jump scares — just the crushing realization that the dead might carry their own secrets, and knowing them changes nothing.