Founded in 1541, Santiago has been the capital city since colonial times. The city boasts a downtown core of 19th century neoclassical architecture and winding side-streets, dotted by art deco, neo-gothic, and other styles. Santiago's cityscape is shaped by several stand-alone hills and the fast-flowing Mapocho River, lined by elegant parks such as Parque Forestal . The imposing Andes mountains can be seen from most points in the city. These mountains have caused it to develop a considerable smog problem, particularly during the winter months. The city outskirts are surrounded by vineyards, and Santiago is within a few hours of both the mountains and the Pacific Ocean.