Grand Étang, Artificial pond in Saint-Benoît, France.

Grand Étang is an artificial pond located in Saint-Benoît on Réunion Island, surrounded by thick forest growth. The body of water sits in a remote mountain area and receives water from a small creek fed by the Bras d'Annette waterfall.

The Grand Étang was once a watercourse, abruptly interrupted by a volcanic flow that left the site enclosed by basalt ramparts. By a decree of 20 April 1896, Eugène Lafosse was authorised to take possession of the domain called "Étang de Saint-Benoît", following a General Council vote of 8 December 1892; it remained private and closed without the owners' permission.

The pond's name appears in Théodore Pavie's 1845 story "Une Chasse aux nègres-marrons", where a guide describes a maroon slave camp beside the water as the least inaccessible of these secondary camps. Walkers today circle the pond in about an hour, eating guava fruit from the invasive goyavier bushes along the way.

The site sits in a remote mountain area, so plan your journey in advance and bring sturdy shoes for walking. The best time to visit is during the dry season when the trails are less slippery.

The pond can dry out completely: it did so in January 2008, in 2007 and again in 2024, while in cyclone season it can exceed 10 m deep. Its water is lost only by evaporation and seepage through the ground, notably through pebble and sand upstream and exposed scoria downstream.