Check the primary sources of images on reddit, by domain:
domain/imgur.com or domain/gfycat.com or what have you
Bonus: [redditp.com](https://redditp.com) (instead of [reddit.com](https://reddit.com)) for a slideshow of images: [redditp.com/domain/gfycat.com](https://redditp.com/domain/gfycat.com)(works with most reddits too: redditp.com/r/wholesomememes) – There’s an NSFW filter if you do (or don’t) want to see it.
(news (radio / print: domain/latimes.com, etc)
An easy way to find out what’s making its way around reddit.
Doesn’t pin you down to any one reddit. And if it interests you, you can go that reddit (maybe even discover a few you didn’t know existed.