Official Blog: Valcour City
Valcour City spans through a savanna and plains. Within its savanna region contains more of a large city with tall buildings, and industrial type businesses. On the plains side it's more residential with a few shops. It even contains an area dedicated to buildings that look like they could have been made in older versions of Minecraft. It also has a small village in a taiga biome.
Of course, there are no rules, after all I can't stop you. I would advise exploring it first though. It contains some secrets, so feel free to explore them. It is primarily a survival maps, but there is much that can be done, like exploring, plundering, analyzing, or destroying it.