If you are in the Hamburg area you could go on an Airbus Factory Tour at Finkenwerder Airfield. The tour is about 2:5 hours long and you can watch Airbus's being built in there final stages. Also you can see new aircraft being tested. The Airbus Beluga's also fly in and out of here carrying wings from the UK. If there is a quite period you can also watch air traffic in and out of Hamburg as it's on the flight path.
Here' a link to Airbus Tours http://www.airbus-werksbesichtigung.de/
All for now happy spotting.