At first glance, there’s nothing remarkable about Belgium geographically. It’s flat and a bit oblong, as Google Maps shows.
But look more closely – very closely indeed – at the country’s eastern border on Google Maps, near the German towns of Monschau and Roetgen, and you’ll notice that its geography takes a turn for the bizarre, with a tiny corridor of Belgium marked as snaking through Germany.
This corridor is just ten metres (30ft) wide, it’s bordered on both sides