I used to build models, but WOW!!! This is very impressive! If you like models, check this out and make sure to play the video at the end.
http://www.dailymail.co.uk/news/article-1383532/Knuffingen-Airport-German-builds-worlds-largest-model-airport.html
http://www.dailymail.co.uk/news/article-1383532/Knuffingen-Airport-German-builds-worlds-largest-model-airport.html