San Agustin, Ilocos Sur, is a municipality located in the northern part of the Philippines. It is known for its rich cultural heritage and historical significance, particularly its well-preserved Spanish colonial architecture. The town is part of the Ilocos Region, which is famous for its unique traditions and local crafts. The area is also home to several natural attractions, including beautiful landscapes and scenic views. San Agustin is near the Caoayan River, which offers opportunities for outdoor activities. The local economy is primarily based on agriculture, with rice and tobacco being the main crops cultivated by its residents.