You might call it a well-trodden thoroughfare, except that it's a river. The ancient Greeks came this way, and the Romans, and now it's my turn, chugging quietly up the Rhone from Arles at the Mediterranean end all the way to Lyon and beyond.
Frankly, though Pytheas and his mates may have had the eye-candy of muscular slaves to admire as they were rowed upriver, I'm preferring the unashamed luxury of my Uniworld cruiser, the River Royale.
I have a cushioned bed, a marble bathroom and floor-to-ceiling ranchsliders; downstairs there's a dining room staffed by people who take the responsibility of serving food very seriously indeed; and upstairs a cosy lounge and open-air deck have both-sides view of the Provence scenery. It's what I've really come for: wooded hills and distant mountains, orchards of hunched olive trees and lines of twisted cypresses, endless striped vineyards, little villages of coloured houses clustered around their churches, and the towns.
The towns all face the river, which brought their first visitors, and arriving by boat places us right in the centre, just a short stroll from the square and important buildings. In Arles, that's the Roman amphitheatre, an oval double-decker of creamy sandstone arches where 2000 years ago gladiators and wild animals fought to the death and the arena was soaked in blood. Now the colour comes from the bright fabrics in the souvenir shops and the umbrellas over the pavement cafe tables. Narrow cobbled lanes wind invitingly between the terraced houses where paint peels off the shutters and graffiti in French seems much less offensive. It's a cheerfully scruffy place, it's very lived-in but undeniably picturesque - and that's official, because who would disagree with Van Gogh? He's an industry here and we visit the originals of his paintings: cafes and gardens still looking the same as when he interpreted them in his vibrant oils.
We drive through more of his paintings on the way to an olive mill.