Yes, I have many map ideas. A little binder full of map plans, ideas and descriptions which I may or may not make into final maps.
However, part of level design is thinking up ideas for your maps. Go get a pencil and some paper and sit down and just sketch out some rough map layouts, doodle, look through your textures, and think for a while about map themes and objectives.
Myself, along with many others, visit Photography and Urban Exploration sites for inspiration. Some useful URLs are:
http://www.abandoned-places.comhttp://dhost.info/RabidMonkey777 (heh, its good to be a photographer)
http://urbanadventure.orgThose three should have you covered for the time being. You can always google more...