Valparaíso (/ˌvælpəˈraɪzoʊ, -soʊ/; Spanish: [balpaɾaˈiso]) is a major city, seaport, naval base, and educational centre in the commune of Valparaíso, Chile. "Greater Valparaíso" is the second largest metropolitan area in the country. Valparaíso is located about 120 km (75 mi) northwest of Santiago by road and is one of the Pacific Ocean's most important seaports. Valparaíso is the capital of Chile's second most populated administrative region and has been the headquarters for the Chilean Navy since 1817 and the seat of the Chilean National Congress since 1990.