
Or what goes for one at the intersection of 50°0’N and 8°16’E
This *used* to be Mainz and it’s still called Mainz-Kastel ( in brackets: Suburb of Wiesbaden) with the boundary between Rhineland-Palatinate (Mainz) and Hesse (Wiesbaden), state capitals both, right in the middle of the central span of the Theodore Heuss bridge.
Why?
Ask someone from the American and French occupation forces from 1945.
*They* came up with idea of stripping Mainz of half its population and the majority of its industry and tax base.
Now, the best bit about this beach isn’t the fact that it’s next to a cool restaurant and bar.
No.
It’s because you get this view

Of Mainz.
Of course, everything looks and feels better when the temperature’s not lurking around freezing point and folk might then get the idea to strip off and jump into the Rhine for a paddle.
Not a good move, unless you want to be featured in the papers as the object of a multi day search by the Wasserpolizei.
And turn up in a week or so, slightly saturated, a few kilometers downstream….