I agree with that. And I would add Nazjatar. I was camping a boss there a few days ago and was bored so went for a wander and found a huge cave which contained one old guy looking after some muck slugs. That was the sole reason it was there - no quest, not needed for exploration criteria, just somewhere you can find by accident which makes you smile. I’m pretty sure there are a lot of other places like that around Nazjatar so I shall be investigating.