An Ice Age time capsule
The entrance to Grotte Cosquer lies 37 meters (121 feet) below the surface of the Mediterranean Sea, hidden in the limestone cliffs of the Calanques near Marseille. This submerged entryway leads to a 175-meter-long, upward-sloping tunnel that opens into a large, partially air-filled chamber. During the last glacial period, when the cave was decorated by Paleolithic people, the sea level was up to 120 meters lower than it is today, and the cave entrance sat high above a grassy plain, miles from the shore.
Discovered in 1985 by professional diver Henri Cosquer, the cave's existence was only revealed to the public in 1991 after three divers tragically died in the access tunnel. The subsequent authentication confirmed it as a major Paleolithic art site, the only one ever found east of the Rhône River. The art within dates to two distinct periods of occupation: an earlier Gravettian phase around 27,000 years ago, and a later Solutrean phase around 19,000 years ago.
Four-fifths of the original cave is now completely flooded. The remaining dry portion preserves nearly 500 individual instances of art. Had the entire cave survived, archaeologists estimate it might have contained between 600 and 800 animal figures, ranking it with famous sites like Lascaux and Chauvet. Rising sea levels due to climate change continue to threaten the surviving art, with the water level creeping up by about 3 millimeters per year.
A prehistoric bestiary
The walls of Grotte Cosquer have 177 animal figures from 11 different species. The most common are horses (63), ibex (28), and bison and aurochs (24). The cave's art is unique for its depictions of marine life. It contains nine images of seals and three of great auks, which are flightless birds resembling penguins. These are the only known representations of such animals in Paleolithic cave art. Other animal figures include red deer, chamois, megaloceros deer with antlers spanning up to three meters, and a saiga antelope.
Beyond the animal figures, the cave is famous for its 65 hand stencils—44 in black and 21 in red. Many of these stencils show incomplete fingers, a phenomenon also seen at a few other sites like Gargas Cave in the Pyrenees. The current hypothesis is that the fingers were deliberately bent during the stenciling process. The cave also contains one unusual engraving of an anthropomorphic figure with a seal's head, called "the killed man." Over 200 geometric signs and other indeterminate markings are also in the cave.
Because the original cave is inaccessible to the public and doomed to disappear, a full-scale replica, Cosquer Méditerranée, opened in Marseille in June 2022. This meticulous reproduction allows visitors to experience the art and atmosphere of the submerged cave through an immersive tour on exploratory vehicles.