City with isolated portions belonging to another country

Click over into map mode or turn on 'show labels' and look at the national borders dividing this city into isolated islands.

"Baarle-Hertog borders the Netherlands – but, because of its unique history of political division, the town is sort of marbled with competing national loyalties. In other words, pockets of the town are Dutch; most of the town is Belgian. You can thus wander from country to country on an afternoon stroll, as if island-hopping between sovereignties."