There's plenty of weirdness to be found. The *chan websites, for a start- the more obscure, the more idiosyncratic and possibly pure.
Trawling through IRC channels is mysterious experience for me.
What little is left of news servers can also be interesting to troll thru - but there's more noise than anything out there on those today, so it can be frustrating at best.
There are also small pockets of gopherspace if you dare to look for 'em.
For more "mainstream", you can also still find old-school style ANSI BBS systems (I know, redundancy) on certain IP addresses; most are simple hobby projects, or focused on certain niche things (retro computing, for instance).
