I've been working on a large dungeon for while, learning the CK alongside
Entrance + 2 regular-sized interior cells + huge exterior cell for boss is a lot of work for one person

Some mostly completed rooms with no lighting:
http://i.imgur.com/mi9d8.jpg
http://i.imgur.com/bE1n2.jpg
http://i.imgur.com/WYVsd.jpg
http://i.imgur.com/Ttpfs.jpg
Empty chest lure trap (those runes are insta-kill and almost impossible to see in the dark, ha):
http://i.imgur.com/UcYwX.jpg
Entry to the boss area is in a cave on top of the waterfall, as the main entrance has collapsed (big lake behind the camera):
http://imgur.com/5c3mH
http://i.imgur.com/jabV2.jpg
Shame I probably cant have precipitation there as there's no way to prevent it from going throught everything
http://i.imgur.com/3wQpA.jpg