On a recent holiday to Brittany, we passed through a small town called Redon. We found place criss-crossed with waterways and bridges.
It is now a centre for pleasure boats.
To me the interesting part about it is that it is here that the Nantes-Brest canal crosses the river Vilaine. Napoleon I of France decided to build the canal to link the two largest military ports when the British fleet was blockading Brest. The mammoth task was started in 1806, first used by boats in 1842, and completed in 1854.
At one time this was a very important crossroads for the navigable waterways of the west. The canal was used to carry freight up until the 70s. Since then pleasure boating has kept a large part of the canal alive.