The City of Vigan's tourist potential is based on its cultural heritage composed of more than 180 ancestral houses, administrative and religious structures, public squares and other historical landmarks within the poblacion, and built during the 18th and 19th centuries. Being the only surviving colonial town in the entire Philippines, Vigan is being developed as a primary tourist destination in Region I.
City of Vigan, the capital of the province Ilocos Sur, is situated along the western coast of Northern Luzon. It is bounded on the north by the Municipality of Bantay, on the east by the Municipality of Santa and on the South by the Municipality of Caoayan, on the West by he Municipality of Sta. Catalina and on the Southwest by China Sea. It is 408 kilometers to the City of Manila; 80 kilometers from Laoag City and 139 kilometers from San Fernando, La Union. It has a total land area of 2,511 hectares or 25. 11 square kilometers. The poblacion barangays which consist of nine barangays have a total land area of 144. 75 has. The adjoining 30 barangays make up 23. 6625 has.
Vigan is a unique environment in both its natural and man-made features. It is traversed by two river systems namely; Govantes River and Mestizo River. Its tributaries flow into the Pangada River in Sta. Catalina, Caoayan River in Caoayan, Boquing River in Bantay and the Bantaoay River in San Vicente.
Unlike other municipalities with towering mountains, Vigan is mostly plains with gently rising hills on the southern portion. Most of its lands are devoted to agriculture which are located outside of the urban center or poblacion. The coastal plains found along the western side of the city bounded by the South China Sea are predominantly settled with Mindoro Beach as its location.