Ponts Couverts 
Description
Originally built to defend the river from attackers the four large towers and bridges that join together the strips of land at the end of Petite France would have been a formidable barrier. When it was a defensive structure the bridges were covered (to keep the gun powder dry, not for the benefit of the defenders), but the wooden structures have long since disappeared.
Charge
Free
Getting There
Latitude: 48.580323; Longitude: 7.739117
What3Words: terribly.status.encounter
