Maps
The Empire
Empire Overview (Woodcut)
Empire Overview
Empire Detailed
Nations
The Brass Coast
Dawn
Highguard
League
The Marches
Navarr
Urizen
Varushka
Wintermark
The Wider World
Outside the Empire
Tactical Maps
Coloured Territories
Regions with Keywords
Maps by Daisy Abbott. Alongside the above, you can take a look at Nicholas Avenell's wonderful zoomable Google version of the Empire Map.
You probably also want to check out the Gazetteer, which tells you all about the places on the map, and perhaps the Pronunciation guide, which tells you how they're said. :-)