The World's Most Bizarre 'Airport International Border': A Runway Directly Spanning Two Countries

Saint Martin island in the Caribbean is divided into French Saint Martin and Dutch Saint Martin. Princess Juliana International Airport on the island is famous (planes fly low over the beach). But here's the interesting part: the airport's runway is in the Dutch territory, yet the latter half of the approach path for landing planes directly crosses French airspace. For decades, the two countries have signed a set of extremely complex 'Bilateral Cooperation Agreements' regarding airport customs, passenger entry/exit rights, and airspace usage.