Route planner for the Roman Empire

As I've said many times before, I LOVE great Google Maps applications.  Here's a fun one!
"OmnesViae: Roman Routeplanner"
http://www.omnesviae.org/en/

Yes, Google Maps for the Roman Empire!  Bonus: It's all in Latin!

Here's a route from Rome to London:
http://www.omnesviae.org/en/#!iter_TPPlace1203_OVPlace427