Some make for easy watching, while others are anything but easy to watch.

What follows is a look at some of the most disturbing documentaries of all time.

There are controversial things here, so some may labelThe Bridgeas having exploitative elements.

Dear Zachary - poster - 2008

Image via Oscilloscope Laboratories

Its disturbing, eye-opening, and bold filmmaking, in just about every way.

Its undeniably one of the darkest and hardest-to-shake documentaries ever made.

This documentary has merit for being uncompromising and pulling no punches, but its also potentially exploitative.

The Bridge - 2006

Image via IFC Films

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Cast Placeholder Image

Earthlings - 2005

Image via Nation Earth

The Memory of Justice - 1976 (3)

Image via Paramount Pictures

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David and Kate Bagby with baby Zachary in ‘Dear Zachary.'

Image via Oscilloscope Laboratories

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Auschwitz in Shoah 1985-1

Image via New Yorker Films

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night and fog0

Image via Cosmo Film

Night and Fog Movie Poster

Men sitting together while recreating a film noir in The Act of Killing

Image via Dogwoof Pictures

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Black Metal Veins - 2012

Image via Unearthed Films

The Killing of America

Image via Towa Productions

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Movie

The Act of Killing

Shoah