Salamanca is a city in northwestern Spain, the capital of the Province of Salamanca in the community of Castile and León. Its Old City was declared a UNESCO World Heritage Site in 1988. With a metropolitan population around 192,000 it is the second most populated urban area in Castile and León, after Valladolid (369,000), and closely followed by Leon (187,000) and Burgos (176,000).