Cádiz is a city and port in southwestern Spain. It is the capital of the province of the same name, a province which is one of eight comprised by the autonomous community of Andalusia. Cádiz, the oldest continuously-inhabited city in the Iberian Peninsula and possibly of all south-western Europe, has been a principal home port of the Spanish Navy since the accession of the Spanish Bourbons in the 18th century. It is also the site of the University of Cádiz. Despite its unique site, Cadiz is, in most respects, a typically Andalusian city with a wealth of attractive vistas and well-preserved historical landmarks. The older part of Cádiz, within the remnants of the city walls, is commonly referred to as the Old City (in Spanish, Casco Antiguo). It is characterized by the antiquity of its various quarters (barrios), among them El Populo, La Viña, and Santa Maria, which present a marked contrast to the newer areas of town. While the Old City's street plan consists largely of narrow winding alleys connecting large plazas, newer areas of Cádiz typically have wide avenues and more modern buildings. In addition, the city is dotted by numerous parks where exotic plants, including giant trees supposedly brought to Spain by Columbus, flourish.