Borders change, sometimes leaving territories in new countries along with their inhabitants. On other occasions, a border can shift slightly to compensate for the flow of a river, or something related. But what happens when a land survey moves the border by just enough for a house to be accidentally relocated into another country? The twin cities of Baarle Hertog and Baarle Nassau are a unique geographical oddity that dates back to a land dispute from the 12th-century, resulting in a crazy patchwork of enclaves and exclaves between Belgium and…