The region of "High Knowledge" along with Lake "The Hand" does not exist!
I have heard of Haute-Savoie and Lac Léman, though.
Any link to this "official common border" km numbers?
So far the best I found is this. Which also states the the border in the Bodensee (persumably the Obersee part) is not set. https://www.swisstopo.admin.ch/de/wi...n-grenzen.html
Edit found: But they specify 347 km
https://www.swisstopo.admin.ch/de/wi...desgrenze.html
I couldn't care less about some privates persons view of the international borders as long as he does not try to defend said imaginary border with lethal force.