kkleiner writes "Frederik and Gerrit Braun, energetic twin brothers with no shortage of dreams, have just finished construction of the world's largest model airport. With 40,000 lights, 15,000 figurines, 500 cars, 10,000 trees, 50 trains, 1000 wagons, 100 signals, 200 switches, 300 buildings and 40 planes, Knuffingen Airport is both a wonder to behold as well as a technological tour de force. The best part of Knuffingen is that it's alive. Forty planes and 90 vehicles move about autonomously. Located in Hamburg, Germany, the model is based on Hamburg Airport."