THE NATURAL RESERVE OF THE GORGES OF THE ARDECHE
The Ardèche (Occitan: Ardecha) is a 125 km long river in south-central
France, a right-bank tributary of the Rhône River. Its source is
in the Massif Central, near the village of Astet. It flows into the Rhône
near Pont-Saint-Esprit, north-west of Orange. The river gives its name
to the French department of Ardèche.
The valley of the Ardèche is very scenic, in particular a 30km
section known as the Ardèche Gorges. The walls of the river here
are limestone cliffs up to 300m high. A kayak and camping trip down the
gorge is not technically difficult and hugely popular in the summer. The
most famous feature is a natural 60m stone arch spanning the river simply
known as Pont d'Arc (arch bridge).
From Wikipedia