Cannibal Holocaust (1980)

1979. Determined to make a documentary about the indigenous cannibalistic tribes of the virgin Amazon rainforest, a small American film crew sets foot in the unexplored, peril-laden jungle. Instead, the team disappears without a trace. Six months later, noted anthropologist Harold Monroe and his seasoned guides embark on a mission to locate the missing documentarians in the heart of the Green Inferno. Before long, unsettling evidence about their fate comes to light. Now, a desperate battle to recover the raw footage begins. After all, the world has the right to know the truth and the unspeakable atrocities captured on the doomed film crew's riveting unedited footage. But what happened to the overambitious explorers and their shocking final two reels?—Nick Riganas