“Baarle-Hertog is noted for its complicated borders with Baarle-Nassau in the Netherlands. In total it consists of 24 separate pieces of land. Apart from the main piece (called Zondereigen) located north of the Belgian town of Merksplas, there are twenty Belgian exclaves in the Netherlands and three other pieces on the Dutch-Belgian border. There are also seven Dutch exclaves within the Belgian exclaves. Six of them are located in the largest one and a seventh in the second-largest one. An eighth Dutch exclave lies in Zondereigen.”
“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.” – http://bldgblog.blogspot.com/2008/07/baarle-hertog.html
other…
see also the enclave within an enclave within an enclave of Dahala Khagrabari