I kid you not. Bits of the Netherlands, inside of Belgium, inside of the Netherlands.
If you wonder how this looks in the real life, well like that:
And these areas are indeed either in the Netherlands, or Belgium, and respective law applies. So if you run out of milk on Sunday, and your local shop is closed, as all shops in the Netherlands are on a Sunday, just cross the road and shop in the Belgium one. Just make sure you are back on the Dutch side if you feel like smoking some weed.
Think that is silly? At one time, according to Dutch laws restaurants had to close earlier.
For some restaurants on the border this simply meant that the customers
had to move to a table on the Belgian side.
The border even goes through buildings.
Photo Source: https://www.flickr.com/photos/twiga_swala/7282488142/
For people to understand us Europeans, and why borders are not an option, one must understand our troubled past that let to places like Baarle-Hertog / Baarle-Nassau. And how we learned to make peace and live with it.
Photo Source: https://www.flickr.com/photos/daveoleary/3374970811/