Game Of Thrones: Opening Sequence

One of the more impressive opening sequences that I've seen is the opening to Game of Thrones on HBO. I've seen other people post the opening video but here it is again for people that haven't seen it.

The opening goes through the map of the world. The producer of the opening sequence said they wanted everything to look organic and full of nature. But they also wanted to mirror the complexity of the world and the show. Here is a video about the making of the video.