Geography
Enclaves and Exclaves: Logistical and Jurisdictional Challenges
Quick fact
Baarle-Nassau (Belgium) and Baarle-Hertog (the Netherlands) form a complex of over 20 enclaves, where a house's front door may be in France and its backyard in Belgium.
Why this is interesting
Imagine a country inside a country—a tiny piece of one nation completely surrounded by another. How can that tiny land have its own laws, currency, and police if you must cross another country to reach it?