The bridge is currently not accessible (neither for pedestrians - gate and sign that entering the bridge ist prohibited) seemingly due to static (structural engineering) problems. In my opinion the closure has been established several month ago. But the signs for the cycle path are still in place.
Alternativle follow the St Jaques trail to the road bridge of the D87 and then back to the .botanical garden

Tjis bridge (weir) is closed for 13 years idicated by an official sign that the municipality of Mimizan closed the the transition in 2005.

Intersection CR5 et CR

Petit Pont sur cours d'eau

parking

Is this the real name of the viewpoint? Seems pretty strange

"à deplacer"
The place has gone or never existed. This is an auto-generated note from MAPS.ME application: a user reports a POI that is visible on a map (which can be outdated), but cannot be found on the ground.
POI name: Ruines médiévales de La Fue
POI types: historic-castle
OSM data version: 2017-07-03T17:28:05Z
#mapsme

Chambre d'hôtes LE CLOS NORMA

Chambre d'hôtes/Bed And Breakfast Sous la Tonnelle

Graine Aquitaine