…fandom.com/…/Dwemer_Puzzle_Box_(Morrowind)
That’s the only cube I can think of, and it was pretty straightforward to find, provided you could handle the enemies in there.
The one that’s truly difficult to find was one of the daedric princes temples. I searched all over that coastline. Turns out the entrance is underwater…
Petros@piefed.social 11 hours ago
The in-game map has information on only the places you’ve visited. There’s a minimap that can work kind of like a compass. That cube quest was super frustrating the first time I did it. If you spend more than an hour on it I recommend just looking it up on the wiki. It’s one of the first main quest missions.