«Advisory Board Evaluation»(PDF). Sítio da UNESCO sobre Sintra: The cultural landscape of Sintra, with its serra, is an extraordinarv and unique complex of parks, gardens, palaces, country houses, monasteries, and castles, which creates a popular and cultural architecture that harmonizes with the exotic and overgrown vegetation, creating micro-landscapes of exotic and luxuriant beauty. (em inglês). Whc.unesco.org
