Here is one: A bridge between Germany and Switzerland has two parts: a German and a Swiss part - duh. There is a difference between them in height, namely: 54 cm. Why?
Germany and Switzerland have a different height reference. Germany’s height system is referred to the water level of the North Sea, whereas the Switzerland’s height system is referred to the water level of the Mediterranean Sea. Of course: the responsible planners of the said bridge knew this fact and took it into account: a height difference of 27 cm… But then the Swiss made a msitake. Which mistake did the Swiss make?
No. I did not make fun of them for that. It is a true story.
The name of the city where this happened (2003-2004) is Laufenburg, and this city has two parts: a German and a Swiss part.
I did not find any English text about that said bridge with the Swiss construction fault. Those who can understand German may use the following link: de.wikipedia.org/wiki/Hochrheinbr%C3%BCcke .
The following photos were taken before the Swiss construction fault of 2003-2004 (see above), namely in 1864 (the first one) and in 2000 (the second one):
This photo was taken in 1864. You can also see a part of the oldest existing bridge of Laufenburg. This bridge was build in the Middle Ages.