I'm definitely going to render something like this. ;)
http://www.nytimes.com/2015/01/13/business/international/in-china-projects-to-make-great-wall-feel-small-.html?_r=1#slideshow/100000003445819/100000003439840
Cool!
When? ::)
Most of this can even be done procedurally (with the cubes), except for the higher part maybe.