Writing a historical novel means knowing how far they can travel on a horse, This is good info right here.
(via Pinterest)
@erinbowbooks and I were just talking about how we needed a google maps hack for horses.
This is a sort of google-ish map hack for horses, boats, and traveling on foot in the Roman period. If a fantasy has similar infrastructure to the Romans with roads, navigable rivers, and anything like a navy it might be useful. Also, it lets you see how climate might impact your travel arrangements.