Why are the Cuevas de Altamira famous?

The Cuevas de Altamira, located in Spain, are famous for their remarkable prehistoric cave paintings, which date back to approximately 36,000 years ago. These paintings primarily depict bison and are considered masterpieces of Upper Paleolithic art, showcasing early human creativity and skill. The caves provide valuable insights into the lives and environments of prehistoric peoples. Their significance was recognized in the late 19th century, and they are now a UNESCO World Heritage Site.