ORBIS, the Stanford Geospatial Network Model of the Roman World, is pretty damn amazing:
For the first time, ORBIS allows us to express Roman communication costs in terms of both time and expense. By simulating movement along the principal routes of the Roman road network, the main navigable rivers, and hundreds of sea routes in the Mediterranean, Black Sea and coastal Atlantic, this interactive model reconstructs the duration and financial cost of travel in antiquity.
That means you can plan your epic adventures as per the ancient world. What the hell are you waiting for? For me to get to Alexandria from the nearest Roman settlement Lindum (Lincoln) it would have taken about 56.5 days. Pirates might well have made that more – or just killed me outright.
(Via Medieval POC on Tumblr.)