My bet is that somewhere out there in the Crave audience, some dedicated "Game of Thrones" fan has constructed a scale version of The Wall and Castle Black, if not the entirety of Westeros, out of nothing but Legos.
I admire such dedication to both the universe of George R.R. Martin and to brickcraft, so here's a tip to add a bit more realism to your project.
Custom Lego minifigures have surfaced on Etsy, squaring off the joints of characters like Tyrion Lannister, Jon Snow, Arya Stark, Eddard Stark, and Daenerys Targaryen (dragon included).
The figures are custom-printed using real Lego parts, but by a Web site of unending awesome possibilities known as Citizen Brick.
Only a handful remain at the time of writing, so get them quickly before they're all killed off, melted down, and refashioned into chairs for another set of minifig guests at the next "Red Wedding." Such a dastardly plot turn would explain, however, why the faces on these things seem to be getting grumpier.