Usually, the only constraint on building a Lego creation is your imagination. Unless, that is, you build a giant structure that demands its own “Lego room.” Say hello to the “Garrison of Moriah” and the 540-square-foot room it inhabits. Inspired by the fantastic buildings in Star Wars and The Lord of the Rings, it’s a huge, detailed sculpture built to the scale of the tiny Lego “people” that inhabit it.
Source: http://www.wired.com/underwire/2011/05/lego-garrison-of-moriah/