I Came across this set up of model train garden located in Hamburg,Germany.The set up has taken over 500,000 hours to build,over 5 years to build is 12,380 feet of train setups.Control by about 40 computers,draws over a million visitors a year.So check out the short video...Click on the link below..
http://www.miniatur-wunderland.com/exhibit/video/5-minutes-wunderland/
http://www.miniatur-wunderland.com/exhibit/video/5-minutes-wunderland/