I've been trying to find a good dungeon isolated enough that travelers wouldn't accidentally come across it but close enough to an open-world town so I can go and wreak havoc whenever I want. (open world so I can go on a killing spree without a loading screen and without killing too many quest givers)
I would go bleak falls barrow so I can go down to riverwood and make hadvars childhood fears come alive but I like everyone else in and I've done BFB so many times that I don't want to actually live in it haha. Perhaps something close to morthal, the foggy swamps would suit, or karthwasten. Gliding down from the upper peaks of the reach to rain death on hapless peasents sounds pretty fun.
How about you?





