@strypey Do you know this anomaly?:

> Baarle-Nassau is a municipality and town in the southern Netherlands, located in the province of North Brabant. It had a population of 6,899 in 2019. The town is the site of a complicated borderline between Belgium and the Netherlands: it encloses 22 small exclaves of the Belgian town Baarle-Hertog, of which the two largest contain seven counter-enclaves of Baarle-Nassau, and the main body of Belgium contains another.

https://en.wikipedia.org/wiki/Baarle-Nassau #exclaves