Cascade du Trou noir, Natural waterfall in Saint-Joseph, Réunion Island, France.

Cascade du Trou noir is a waterfall in the commune of Saint-Joseph, in the south of Réunion, a French overseas department in the south-west Indian Ocean. A narrow column of water drops from a low ledge of a dark, jagged rock face into a pool at its base; green vegetation clings to the rock and lines its top edge.

The waterfall lies on the territory of Saint-Joseph, the commune covering the south of Réunion, a French overseas department in the south-west Indian Ocean. The sources record no founding date, event or development for the site itself; its history is that of the communal land on which it stands.

The waterfall lies in the commune of Saint-Joseph, in the south of Réunion, a French overseas department in the southwestern Indian Ocean. Its name, "Trou noir" (black hole), refers to the dark rock face that the narrow stream drops beside into the pool below.

The easiest way to reach this spot is to park near the Bailay bridge and follow a gentle path along the right riverbank. The walk is short and fairly straightforward, making it accessible for most visitors.

The waterfall lies on the territory of Saint-Joseph, the large commune covering the island's entire southern tip, so the cascade belongs to the same municipality as the wild coast around Manapany and the heights of the Langevin valley. Its name, "Trou noir" (black hole), matches the dark rock face the water drops from.