The Cave of the Coins is an archaeological site framed within the complex Cuevas del Monte Castillo , and is located in Puente Viesgo (Cantabria) . It is included in the list of World Heritage of Unesco since July 2008 , within the site "Cave of Altamira and Paleolithic Cave Art of Northern Spain " (in English , Cave of Altamira and Paleolithic Cave Art of Northern Spain ). 1