Been thinking on a question - HP Lovecraft moaned from time to time about "non-Euclidean geometry" driving people mad and providing access to other dimensions, etc.

Is there a networking or ip-space corollary to non-Euclidean geometry?* Some kind of impossible internet configuration that induces madness or allows one to access the places beyond the limits of human understanding?

(*The notional shadow of example[.]com doesn't count, I'm looking for non-obvious examples.)