Here are some links to real castle maps. I like to base my maps on authentic castles and I thought some others might like these links.

http://www.thislandwales.com/carregcennen.htm
http://www.thislandwales.com/pembrokecastle.htm
http://www.thislandwales.com/caerphillycastle.htm
http://www.fromoldbooks.org/OmanCast...x1467-q50.html
http://www.fromoldbooks.org/OmanCast...Ludlow-Castle/
http://www.fromoldbooks.org/OmanCast...philly-Castle/
http://www.fromoldbooks.org/OmanCast...mbroke-Castle/
http://www.fromoldbooks.org/OmanCast...HarlechCastle/
http://www.greatcastlesofwales.co.uk/pembroke_plan.htm
http://www.conisbroughcastle.org.uk/...opy_web_03.jpg
http://www.greatcastlesofwales.co.uk/castles_index.htm
http://www.skiptoncastle.co.uk/3dmap.asp?page=4

Sorry if there are any duplicates. I just went through my links.