San Carlos de Bariloche (commonly called Bariloche) is a town in Argentina’s Patagonia region. It borders Nahuel Huapi, a large glacial lake surrounded by the Andes Mountains. Bariloche is known for its Swiss alpine-style architecture and its chocolate, sold in shops lining Calle Mitre, the main street. It's also a popular base for hiking and skiing the nearby mountains and exploring the surrounding Lake District.