A new museum in France gives visitors a chance to step inside of a replica of the famed Cosquer Cave, an underwater grotto off the coast of Marseilles. Over the years, the cave has been submerged and today only about 150 carvings remain. They include works from two phases of the Upper Paleolithic Era: 27,000-year old hand stencils from the Gravettian Era, and 19,000-year old depictions of animals including bison, ibex and seals, which date to the Solurean Era.