Have you used https://anonramblings.com/ ? It's actually a little dapp on Hive created by @emrebeyler. And yes, it's open source.
It is a 4chan-like experience that's a diamond in the rough. One of the more random things I've came across a while ago was a YouTube video.
Under normal circumstances, I would be afraid to click on any video links, but I figured it was YouTube. How bad could it be, right?
(Warning: it's actually a bad idea to click on random links you don't know.)
Well, lucky for me, it was a rather fun and random video by Flashgitz. They are actually an established animation channel.
Here's the video:
Now, show me some gems you've seen on AnonRamblings.