5 German exclaves in Belgium that are separated by a meters wide bicycle path from the rest of Germany

Schematic map of the German exclaves in Belgium along the way of the Vennbahn (Click to enlarge!)
The exclaves on Google Maps

These enclaves/exclaves are located along the border of the European countries of Belgium and Germany, just south of the city of Aachen. Here is an example of what these borders actually mean at some locations: