Kreuznach has a wonderful park called the Roseninsel (Rose Island) which used to be an island before they filled in part of the river in 1900 and which gets its name from the Rose Growers’ Exhibition held there in 1905.
Sprinkled among the usual sculptures of Bismarck and Kaiser Bill, they’ve got a really cool Planet Way, with a sculpture of the sun and discs representing the planets set up at the correct relative distances along the river.
So if you’re strolling along at a normal pace between Earth and Venus, you’re actually (relatively) flogging along at three times the speed of light.
(That’s wot it sez ‘ere, Brian..)
Unless you’re a quadruped, of course.
Then you’re lucky to do half that…..