Campaign Cartographer is a great map making program.
I've owned campaign cartographer for several years but not really got the hang off it so I challenged myself with mastering it.
It's been a bit of an uphill struggle at times but my saving grace was purchasing the Tome of Ultimate Mapping a huge PDF with tutorials on using all of CC3+ features.
I'll post up some examples of finished maps but here is a little taster of one of the maps I have been working on (be warned its a pretty large file)