What games feature interesting architecture ?

You can do a lot in the Sims 2. Beyond that there really is not many games that do this. In Sims 2 you can go to other sites and download add ons that give you better custom and creative designs and ideas to do for houses. Someone once made a gigantic Atlantis building that looked very nice and all that. Looked just like a palace and everything. Sims 2 is your best bet until Sims 3 comes out, but that would be after Spore comes out first, though.