Here's some ideas:

1. a dark town hidden in the labrinyth where all the NPCs are hostile until you disable them.
[D-TOWN]

2. A glitch town hidden behind a seemingly solid wall where bugs and bad programming go to die. Anything can happen there if you know the right codes. [ A Hacker's Utopia]

3.A floating globular beach town where players go to relax and chat with each other [Serillena Beach]

4.A town completely abandoned except for an excess of cats. ['Why are there so many cats?!']

5. A stony mountain island with a mini towns built round it in a spiral. Large crafting center with many artists and craftsman living here.[ Markotta Mountain]

How do these sound?