The Frenchmen who gave the cave its name Historical milestone · Pomar de Valdivia, Montaña Palentina, Palencia Image of Pomar de Valdivia, not of the place itself. The cave owes its name to the fact that it served as a refuge for French combatants during the Peninsular War that began in 1808; the popular place name ended up prevailing over any geological designation. 1808 Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Pomar de Valdivia