The great folks over at Listverse have put together a great list for the Top 10 Most Unusual International Borders.
Here’s an excerpt:
9. Baarle-Nassau/Baarle-Hertog
Baarle-Nassau is a Municipality in the Netherlands. It shares an unusual border with the Belgian municipality of Baarle-Hertog. Baarle-Hertog consists of 26 separate pieces of land surrounded by Baarle-Nassau, but some portions of Baarle-Hertog also contain areas belonging to Baarle-Nassau. The smallest parcel belonging to Belgium is only two-thirds of an acre (one-quarter of a hectare). The border is so complicated that there are even some houses that are bisected by it. In the picture above you can see the Netherlands on the left and Belgium on the right.
It’s a fascinating article.