Cueva de los Casares

Cueva de los Casares is a cave in Riba de Saelices, Guadalajara, Spain, discovered in 1933. It contains Paleolithic cave paintings, most notably depicting what some scholars argue is the earliest representation of human understanding of the reproductive process, including images of copulation, pregnancy, childbirth, and family life. Mammoths and other animals feature frequently in the illustrations. It was declared Bien de Interés Cultural in 1935.