Among the tourist sites I already wanted to visit this site: Le Puits d’Enfer; a hike is located at this site.
Geolocated about twenty km south of Parthenay and north-east of Niort, in the opposite direction from the Marais Poitevin, which is connected to the Atlantic ocean, and touches the western gates of Niort, is this ride, in Deux-Sèvres.
[not far from the A10 motorway towards Bordeaux, and the junction with the A83 towards Nantes]
Southern tip of the Gâtine massif, making the geological link between the granite hills and the limestone plains, called ‘Seuil’ or ‘Passage’ du Poitou, this site probably overlook the Sèvre Niortaise valley.
There are: a culminating point, a rock chaos, a stream and a waterfall, surrounding vegetation including a tree classified as “remarkable”; bonus: hiking paths with stairs, enough to take deep breaths of chlorophyll, in peace, far from the crowds.

Southern tip of the Gâtine massif, tourist site: Le Puits d Enfer





Below, you will find on the map Le Puits d’Enfer, with these GPS coordinates
Note: There is another interesting site with a similar name, on the coast with seashore paths, in Les Sables d’Olonne, in the department of Vendée.

Sources :
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Sites
– Tourisme Deux-Sèvres, Le Puits d’Enfer – Site: Le Puits d’Enfer
– Commune d’Exireuil – Site: Le Puits d’Enfer
– onetwotrips: Deux-Sèvres, Rando Le Puits d’Enfer