The 450 km border between the Netherlands and Belgium is famously irregular, especially in the town of Baarle, where it creates a bizarre patchwork of enclaves and counter-enclaves. In Baarle, parts of Belgium (Baarle-Hertog) are scattered inside the Dutch town of Baarle-Nassau, with even smaller Dutch parcels nested within those Belgian pieces. As a result, homes, shops, and streets are often split between the two countries, with some buildings literally divided by the border. Each property displays a marker showing which country it belongs to, and residents may deal with two sets of laws, taxes, and services. This peculiar arrangement stems from feudal-era land agreements that were preserved when modern borders were drawn, making Baarle one of the most complex border zones in the world.