Maybe, some Mad Max or Fallout-style post-apocalipsyse buildings?
You know, this Raiders camps (post-apocaliptyc chem-filled and drugged maniacal and maybe cannibalistic barbarians),
Vault-cities - made from Vaults and somelike similar medieval arabic architecture...
Ghoul towns (mostly, but not must-be highly irradiated) inhabbited by rational or mindless zombies (Ghouls)
Supermutant encampments or towns (captured and fortified villages< pre-war military bases, conquered Vaults) - similar with orcs or ogres... You know, big barricades, bloody trophies, fires...
Legion camps (Casear of post-apoc!)
Maybe some high-tech Brotherhood of Steel or Enclave bases...
Scrap towns (made from old rusty junk)
There is Fallout-mod developing somewhere, but long time not seen, and it's models is not so perfect =(
Images, photos, info and screenies may be here
http://fallout.wikia.com/wiki/Fallout_games