Shizen isn't your average Survival Server; It has a bunch of slight modifications, to tweak the classic SMP Style, to something rather.. different.
Our Server has:
Custom World and Terrain Generation, Towny, a Big Economy, and to top it off, Custom Dungeons similar to how you would see them in Games like Terraria.
We don't have any Shop for custom Ranks, so every Player has the same Permissions.
Oh, and there are a bunch of custom Mobs, I completely forgot to mention them.. :)