Post processing volume??

Wondering where the hell the post processing volumes have gone. I'm in version 2017.3.1f1.

I'm sure that there used to be a post processing volume as standard on other versions but I can't seem to find it now. I'm kinda screwed without it too. And I've downloaded an asset to replace it but that won't even work. I have a big open world and I want to add different colour grading to different areas- woods/snowy etc so I don't know how to do this if I can't get the volumes to work

 

I haven't used them but I noticed the brand new "3D Game Kit" sample project uses them. Might dig in that.

 

Looks like it's not fully supported yet, it's still in Beta or something but you can download it from Github from here: https://github.com/Unity-Technologies/PostProcessing