There's a lot of memorably worldbuilding in the Clockwork City but oddly my absolute favorite is the broken fan doorway in the Slag Town Outlaw Refuge. I want this in my house.
The sound design of the stuck fan is absolutely great, always makes me stop and listen and smile. I want a symphony of these things in my home, much like I put (PvP achievement award) oil pots not only as lovely lava lamps but also due to the bizarre sloshing sound they make. We need more sonic furniture! (the noise did make me terrible nervous and want to dodge roll away more often than I care to admit at first)
SONIC FURNITURE!!!