after a quick read through of the brief and associated stuff, I was struck by the possibilites of "interchanges", places where lots of people cross paths. I know modelling people is basically impossible in 5 weeks, but since the places I'm thinking of are usually full of people, having them empty is going to automatically add a bit of distance from the usual.
In particular, I'm drawn to the possibilities offered by stations and ports (sea and air), as they are often large, impersonal spaces (and offer plenty of scope for shadowy figures glimpsed in distant doorways, that sort of thing
XD). They also give an opportunity to try out various architectural styles and other ways of mixing things up a bit