Gouffre de la Pierre Saint-Martin
| Gouffre de la Pierre Saint-Martin | |
|---|---|
Gouffre de La Pierre Saint-Martin below the road. | |
| Location | Isaba |
| Coordinates | 42°58′05″N 0°46′09″W / 42.967924°N 0.769250°W |
| Depth | 1,410 metres (4,630 ft) |
| Length | 88,111 metres (289,078 ft) |
| Elevation | 1,717 m (5,633 ft) |
| Discovery | 1950 |
| Geology | Limestone |
| Entrances | 14 |
The Gouffre de la Pierre Saint-Martin, also called Gouffre Lépineux (Spanish: Pozo Lepineux), is the original entrance to a major cave system located in the massif of La Pierre Saint-Martin (massif de la Larra-Belagua to the Spaniards), in the immediate vicinity of the Franco-Spanish border and the French commune of Arette, in the Pyrénées-Atlantiques in the Nouvelle-Aquitaine region, under which lies part of the cave network.