VEER OFF THE INFORMATION SUPERHIGHWAY!
Here I've collected the best links for going down rabbit holes, if a link contains something somewhat objectionable I'll add a warning.
Thousands of forums for probably any topic you can think of, NSFW subreddits and posts are marked as such
People looking for specific Subreddits, and people listing specific Subreddits
Exactly what it sounds like
The free encyclopedia, you aren't allowed to cite it in your shitty essay for US History but you can have a helluva lot of fun on it
In-depth wikis on almost any piece of media out there
The Internet Archive
Uploads on everything from arcade games to antique books
Knitting magazines! Computer magazines! Sports magazines! all pretty good scans too!
What if fantasy games lived up to their names?
The Internet Arcade
2,643 Acrade games you can play in-browser
Wanna read about people's ideas about fictional people kissing? Well now you can do it! They even have a category for cargoships
Showbiz Pizza Wiki
Lots of information on Showbiz pizza animatronics and a lot of other Creative Engineering works
A fandom wiki about Animorphs!