yes, there are lots possible locations for such 'quests' : Temple, oxford caves, robot mine, maybe some new ones like underwater 'the crashed mothership' which can be only found with one use 'finder'. Maybe a series of mini quests; where items from 1 & 2 need to be crafted into key for 3rd quest.
Another idea, I had ...(still waiting for the
MA e-mail about my other ideas lol) was the mentor & disciple quests (maybe choosing 3 from available 6) 3 which have to be completed togther to release the disciple & get a better gift. I would suggest one very simple quest for the start of relationship , then a harder one for the half way point & final one where team is the most important thing for success.