Dwarven ruins are the coolest shit in this game.
So I'm assigned a Dark Bro. contract and I fulfill it. The guy I killed was hiding out with bandits in some dwarven ruins. I kill him and start exploring deeper. After passing many traps and bots (and killing some of the bots with clever use of the traps lol dumb bots), I come to a room filled with Falmer and lots of clanking gears.
After dispatching all the falmer, who are blind, and literally don't see me in front of their face even if I'm not sneaking, I discover that all the gears in the place are not working. They're all jammed with something, including bones, like a human spine (uck, nice touch, Bethesda). So I remove the instruments jamming the gears and they all start to whir.
I punch the button to get out of this place (or so I thought) and BAM. This giant door slams down and a huge dwarven centurion comes clanking out. EPIC MOMENT!
I kill the 'bot, go into the next room and there's this mysterious dwarven mechanism, which won't activate because I don't have the right piece. Off to find it.