Grotte des Huguenots, Cave entrance in Vallon-Pont-d'Arc, France.

Grotte des Huguenots opens in the Ardèche gorges about 1 km upstream from the Pont d'Arc, in the commune of Vallon-Pont-d'Arc. Its porch is a vast jagged opening in a pale cream rock face, partly curtained by ivy, with a dark grey rock wall on the right. A low wall of irregular light stones with a thin metal railing stands at the base. The cave drops 35 m over a development of about 200 m.

People occupied this cave starting in the Stone Age, with archaeological finds spanning from the Upper Paleolithic through the Bronze Age. These layers of remains show that the site drew human visitors repeatedly across thousands of years.

The cave takes its name from Protestant ceremonies held here in 1890 during a regional synod. This religious history remains connected to how locals understand the place today.

The cave is reached from the Ardeche valley; before the Vallon-Chames road was built, visitors arrived by boat from the river. A narrow second opening, the "trou du Guetteur", led north into the hillside. Visits are only for groups and by appointment, arranged through the CERP for the town of Vallon-Pont-d'Arc.

In 1947 Maurice Martin bought the plot containing the Grotte des Huguenots and the Grotte des Tunnels, installed a kitchen inside the cave and planned to turn it into a dining room. The Ardèche floods of 1958 damaged the works, yet the terrace of the porch was finished around 1960. Martin's death in 1961 ended the restaurant and food-trade activity.