[X] Altdorf
[X] Tilea
Altdorf is great for exploring the part of the setting with perhaps the greatest direct amount of writing. It's the beating heart of the Empire, and that puts it squarely at the nexus of many other interesting occurrences.
It's also got an explicit bonus for stuff that will blow up the city if we get our hands on it, in case we're worried about not receiving enough of an incentive to do that already.
Tilea is for stuff directly related to human conflict, I think. That's not a small subject -- it's an incredibly big subject. It's a very interesting subject that gets overlooked way too often in the constant rivers of evil zombie deer demons and attacks from things that aren't other people.
How do normal people handle a dragon appearing on the battlefield? What do castles look like against the sorts of siege weapons most people have? When you can comfortably assume that your neighbors are the ones who don't have your best interests at heart, what do you do about that? What does a city do when it doesn't have a species of obsessive engineering geniuses to outsource its metalworking to? It's stated fairly clearly that for most people faith is a matter of faith even up north -- what do the human institutions of the faiths look like, and what does it look like when material politicking crosses paths with the business end of the spiritual world?
That's a lot of words for saying that it's the place with the most normal people, and that means that when we run the museum we get to show the cool stuff to the most normal people. Every Imperial has seen a Beastman -- don't you want to show a Renaissance Era child a lightningbolt gun?