Interesting concept. I can imagine that such a system could be integrated into these, although I'd expect it to be rather rare. No harm in including it.
There is frequently a bias towards complex systems involving false bottoms, pumps, waterfalls, etc...yet a great many hobbyists keep rat snakes, dwarf pythons, scorpions, tarantulas, and various desert lizards [among other things]. Many of these could be featured in a landscape put together in a day or two, using no complex setups. For ratsnakes, here's a good source of ideas:
http://www.bluechameleon.org/2007%20...travelogue.htm
I'm tempted to link some thumbnails, but there are just too many inspiring pictures!
For gray-banded kings and western rat snakes...
http://www.bluechameleon.org/2006%20...20Part%202.htm
Tarantulas [and others]:
http://www.bluechameleon.org/2006%20...-%20Mexico.htm
Awesome desert habitats here, especially the last picture:
http://www.fieldherpforum.com/forum/...4a1cb80d8fc8d7
Some of these would be great for desert scorpions...pick up a couple fluorescent minerals and you have a desert of rich brown rock and sand during the day, with a glowing rainbow under the blacklight!