While surfing around to find some useful websites regarding setting, I stumbled across Roads to Ruins. The site is maintained by Ed Kane of Washington state. While it is unclear to me if he has updated it recently, he has compiled an impressive amount of information on the castles and ruins of Germany. Many of the individual locations have been detailed with specifics for folks who wish to travel to Germany and sightsee of explore such places. At the very least, the list of castle and ruins locations alone is an excellent starting point for someone to do their own research on these many excelent sites. Have a look and spur your imagination with the many photos and particulars to be found there.