Omnesviae: Roman Routeplanner – an initiative by René Voorburg
Orbis – the Stanford Geospatial Network model of the Roman world. Major research site from Walter Scheidel & Elijah Meeks, et al. It’ll give you journeys and the timings for these on different modes of transport.
Roman Roads in the style of modern transit maps by Sasha Trubetskoy. These are just so good.
Termes Castle in France. All about the castle that is the inspiration for Kanvoleis. I visited when the early orchids were out by the track way to the castle.
Wynn, Marianne. Geography of Fact and Fiction in Wolfram von Eschenbach’s “Parzival”. The Modern Language Review, Vol. 56, No. 1 (Jan., 1961), pp. 28-43 http://www.jstor.org/stable/3721685
The German Medieval Wiki page has information about locations in Parzival, including Wynn’s maps.