Greenways

Old unused railroads and (tow)paths along canals and rivers are sometimes transformed into beautiful and non-motorised biketrails, often "in the green". The name of these routes is in many languages naturally: voies vertes - Groene wegen - Greenways - Vias Verdes - Radwege.
These routes don't form a network, these are individual beautiful routes with different distances.
More information: European Greenways Association - Af3v - Chemins du Rail - RAVeL Wallonië - Vias Verdes - Voiesvertes.com
Other interesting groups on this website:
Rail trail
Jaagpaden - Towpaths - Halages - Leinpfads