I'm doing something that no-one else seems to have done (as far as I've been able to tell). I'm flooding a Cavern. With Magma.
It's close to done too, in terms of preparations, for those that want a look (Cavern's a bit big to go round getting screenshots). F5 will take you down to the cavern in question.
http://dffd.wimbli.com/file.php?id=4658
Update - Newer version that's closer to finished. Pump stack won't work as I'm in the middle of building another water reactor to power it.
When it's all done, I'll try to stick notes on all the levers to mark what's what. The reservoir controls have gotten a little Dwarftastically complex for all the outlets and sub-stations.
http://dffd.wimbli.com/file.php?id=4659
The walls are mostly done, save for one that I cant get at the base off till i clear the water out with magmaIt. Is. READY!
http://dffd.wimbli.com/file.php?id=4663Saved game will start you looking at the levers you need to pull to release the Fun (top lever's the north floodgate, bottom one's the east). Fortress tunnels are safe from the magma (Edit: Whoopsy. There's a tunnel just to the NE of the splatter point of the east outlet. Seal it with a door or wall, or everyone in the lowest area of the fortress is going to have a rather warm bath) and there's a lever a few levels down above the reactor and by a gearbox if you need to stop the pump stack.
Oh, and there's an FB resting in that cavern lake the south side under the water. He hasn't moved, so good luck if you can encase the bugger in Obisidion.
I'm gonna keep at it and make a little biosphere for some lucky dwarves...