Click over into map mode or turn on 'show labels' and look at the national borders dividing this city into isolated islands.
Borders, City Squares
"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."
Links: bldgblog.blogspot.com, en.wikipedia.org