An online atlas and cartography tool

Westeros

Westeros from the rule of Robert Baratheon up to [spoiler alert]

Roman Empire

Extent of Roman rule from 0AD to 300AD. Pax Romana!

Galactic Empire

The Fall of Trantor and the Rise of the Foundation

Middle Earth

Frodo's journey from the Shire to Mordor, and the kingdoms of Gondor, Rohan, Saruman, and Sauron.