My longtime fortress (forgot the name). A volcano embark with coal and a lovely steep cliffside with flat plains and a river next to it. I built my favorite magmacannon on that cliff. (lovely 5 pump structure taking magma from a large tank and pumping it on a large cannal infront of my gate)
Clown infested lower mines, drowning chambers, obsidian casting trade depots (they were initially just magma depots but the elven junk burned too long so I added water), militia commander named Catten with 34 pet cats and a wife with title "the ultimate depression of angels"...
A fire-breathing FB that burnt every drop of fat of its body after the first fire attack. It soon started slaughtering cave inhabitants (don't remember which ones. Cave fish men I think) You would think that fire breathers would be fireproof..
Interesting partial floodings. I had two canals running through my fortress from the surface to the depths. One for magma and one for water. I made a tiny mistake and built the magma safe floodgates in the wrong one. Flooded 5 floors with magma and later nearly 10 with water when trying to get rid of the magma. (Including the bedrooms. The sleeping dwarves didn't even notice. Except for those whose doors were open at the time..)
By the end of the fort nearly everyone had stopped caring about anything anymore.
Oh, and were-wombats and koalas!
Man, I loved that fortress.