Quests found "off the beaten path". The other day I noticed Darklight Tower for the first time. Went inside and discovered a quest I'd never done before, despite my probably 1000+ hours playing the game since release (700+ on my Steam account, probably another few hundred on my boyfriend at the time's).

I've done all the factions, main quest, DLC and I thought I'd done a lot of side quests as well... What are some other side quests that it's unlikely to come across without doing a bit more exploring, and don't come up in the "I'm looking for work"/rumours system? For example, I have also never done Angi's archery training (but I have heard of it - it's on the to-do list!)