At first glance..

I like how here, Fideli Sundqvist takes close up shots of her cardboard city, so they appear quite large, but then when seen from afar you realise that they're actually smaller than expected. 

And here's a more interesting concept of her city being inside a box. At first, it appears her city is in a dark room possibly sitting on a table. The lights illuminating from inside the buildings create a nice effect where the light rays seep through the windows and cast shadows on the walls. And then she zooms out and takes photos from a different perspective, outside the box.