Forum:Scale of the architecture landscape ect. comparing the books vs. the series

I have read the 2 first books before i even dare to watch the first episode from HBO, and some things hit my mind is there a reason that HBO have tone down the grandeur of diff. locations like Kingslanding, wich for me would be something like old ROME, cause when i see the TvShow is feel more like a smaller city, same goes with the Red Keep as described in the book the Iron throne was much bigger + the throne room was massive and grandiose, so i just wonder why HBo have toned is so much down? King of Seven kingdoms are hard to belive with no grandiose, plus there some other things is wish they hadden Skipped, but i still love the Show very much

​Nb: No Talking Ravens :-/  why ????