I think they both have a large amount of placeables in close quarters, All the houses in The green garden district have extra adornments, and a lot of the scenery is done via placeables, and the same goes for Wharftown.
Usually it doesn't matter where I come in from, but the crashes usually follow if I alt-tab for whatever reason.
I'll try lowering my graphics when I enter the area the next few days and we'll see what that does!
