Baarle-Hertog is a Flemish municipality of Belgium, much of which consists of a number of small Belgian exclaves fully within the Netherlands creating interesting and complicated borders with the Dutch town of Baarle-Nassau. With a total area of just seven and a half square kilometres, the Flemish exclave of Baarle-Hertog is made up of 26 different pockets of land. Of these, 22 are surrounded by the Netherlands, three are situated on the border between the two countries and one is in Belgium itself. In turn the Flemish exclave hides within its boundaries many Dutch counter-exclaves (an exclave inside an exclave). Maps, photos and more details are available here.