I was watching Floyd Around The Med the other day and he ended up at some monestaries in Greece (Meteora I believe) and it gave me some ideas for a Bryce creation.  The problem is the more I think about the cliffs the less and less I have any idea how to build them.  I've done a quick look around for photo's of the type of thing I'm trying to build so for reference...

and

The problem is how do you get overhanging rock formations, etc.  The buildings on the top are not a problem but I can't work out how to get the rocks looking like that.  My only thought so far would be to try and map a terrain side on but that means I'd have to work out my camera angles before I start which isn't nomally the way I work.

Any advice, as ever, gratefully recieved.