Just be aware that Europe isn't so easy. Greece is extremely sensitive to photographers anywhere near airports, and if they're military- you will be locked up. Anywhere near airports or military installations
anywhere, you must be extremely discrete about pulling a camera of any sort out.
http://news.bbc.co.uk/1/hi/world/europe/1649617.stm
These people lived a nightmare for a long time- because they were aeroplane enthusiasts, even though they were carrying
their hobby paraphernalia with them. Be aware that many holiday destination airfields are also shared with military facilities.