My town in France has this as a riverside walk, spread over 5 km into the next towns. Well, my hometown has the inner system over a few hundred meters, then it'

My town in France has this as a riverside walk, spread over 5 km into the next towns. Well, my hometown has the inner system over a few hundred meters, then it's vast emptyness over the next 5km :) http://www.planetesdelyvette.universite-paris-saclay.fr/IMG/png/plan.png http://www.planetesdelyvette.universite-paris-saclay.fr/IMG/...