What is your favourite dungeon, cave, ruin, or mine to explore?

Honestly, I love Vilverin, an Ayleid Ruin right across from the Imperial JaiI, it has a nice story line, lot's of traps, puzzles and secret passages. I also love Capstone Cave, North West of Bruma, as well as Rielle, another Ayleid Ruin near Bruma.

rockmilk is the most memorable, if only because of how many times i raided it. it had two groups of banditos battling it out, and i farmed that place for black bows. Having not really played ob in a while i can still remember the enemy placement of that place