The Pyrénées - Mont Perdu World Heritage Site (also known as UNESCO Patrimonio Mundial Pirineos - Monte Perdido in Spanish) is a World Heritage site straddling the border between Spain and France in the Pyrenees mountain chain. The summit of Monte Perdido (French: Mont Perdu) is on the Spanish side of the border. The site was designated in 1997 and extended north in 1999 to include the Commune of Gèdre in France.