Gm_Bigcity
Basically just a really big city that's good for building contraptions and getting lost in. So big in fact that it has hit pretty much every source limit possible at one point or another. A bit blocky but it's HUGE!

Features:

- It's pretty big
- Custom soundscapes
- Some of the doors work (teleport you to the roof)
- A couple of indoor areas
- AI nodes. NPCs will chase you through the streets!
- Lots of places to build
- Business, residential and warehouse themed districts
- Garbage dump
- A serial graffiti artist?
- Mysterious invisible trains and cars and dogs
- A weird open air sewage plant. Don't ask me.
- Plenty of dark alleys if you're into that sort of thing
- And much much more