|Mont Saint Michel, but it could be Kings Landing|
People are making fun of Snoop Dogg or Snoop Lion, or whatever he's calling himself these days for saying that Game of Thrones is historically accurate. Fans of the show love to make fun of other fans who miss the fact that Westeros is clearly not on Earth. It's that sort of superiority that geeks just love.
But let's look at it realistically. George R.R. Martin based the plot on the War of the Roses. The Lannisters are based on the real-life Lancasters, and so forth. The style of this world is based on Medieval Europe. There's nothing all that alien or foreign it the look of this world. Game of Thrones relies heavily on Earth mythology - swords, knights, beheadings, dragons, zombies (albeit ice zombies).
When you look at the map of Game of Thrones the geography, it's nothing like Earth, except...it may not be as heavily based on European geography as the Lord of the Rings was, but still, it kind of is. The seven kingdoms are on a big island continent, and then you cross The Narrow Sea to get to more countries. England is on an island with other nations (Scotland and Wales), and from there you cross the English Channel (a narrow sea) to get to other countries. Hell, the big giant ice wall manned by the Night's Watch is blatantly Hadrian's Wall.
The only thing that's radically different is that summer and winter each last for years unread of months, and the duration is irregular. Winter can last for 7 years or 20. But I think we can forgive some fans from noticing that important detail. The show might as well be called, Wait, Who Is That Again? Between all the naked bodies, and massacres and a cast so large that some of them only see each other on the red carpet...exactly how shocking is it that some fans think this show based on the events of medieval England is actually taking place in medieval England?
Oh, and scientists have figured out a way for those long, irregular seasons to be theoretically scientifically possible. Basically, big cosmic disaster screws up a planet's orbit. With all the talk on Game of Thrones about how entire societies can crumble and disappear (like Valeria which we sailed past last week), how can we be sure that this isn't all taking place many thousands of years in the future? All this has happened before, all this will happen again.
I'm not putting forth my own little fan theory. But I am saying that people need to fucking roll with it when other fans mistake Westeros for medieval England. Because in some ways, it is.