/r/A1B21F8244F
Weird encrypted messages, or just data dumps, or something else. The mystery is the fun part.
/r/AmazonWTF
Strange things you can buy on Amazon
/r/bench and /r/fence
Originally spawned from amusing comments, these subreddits still get traffic
/r/AnimalsWithoutNecks
Yep
r/crazystairs
Cool staircases