The 2015 Spain 2 euro commemorative coin honours the Cave of Altamira, a site of immense historical and archaeological significance. Located in Cantabria, this cave is world-renowned for its prehistoric polychrome paintings, which represent one of the most important artistic expressions of the Upper Palaeolithic period. The national side of the coin features a detailed reproduction of a bison, one of the most iconic figures found within the cave's extensive gallery. By selecting this motif, Spain highlights its profound commitment to preserving UNESCO World Heritage sites, acknowledging the cave's status as a foundational element of human cultural history. This issue was minted in 2015 with a total mintage of 8,000,000 coins.