
Villa de Merlo is located in the Province of San Luis and has around 12,000 inhabitants. It is the principal tourist’s destination in San Luis, and the third most populous city in the Province. There is a variety of hotels in Merlo and other types of accommodations. In 1794, Juan de Videla visited Piedra Blanca and saw that the place was suitable for the foundation of a town, as he afterward informed the Marquess of Sobremonte.
On October 1, 1796, Sobremonte ordered the formalization of its foundation, under the name of Villa de Melo ("Town of Melo"), given in honor of Pedro Melo of Portugal. On the morning of January 1, 1797, the townsfolk witnessed the formal foundation of their town. The ceremony took place in front of the chapel, beside an image of the Virgin of the Rosary. (At the same time, Saint Augustine was chosen to be the patron saint of the town.) The name of the town was altered over time and became Villa de Merlo. One may see, in Marqués de Sobremonte square, plaques which commemorate the ceremonial founding of the town, and he may visit the old communal well and the chapel of Nuestra Señora del Rosario nearby.Weather is mild and dry, scant wind, and the area has an abundance of streams. Merlo may be divided into two from the standpoint of tourism.
La villa Colonial ("the colonial town"), whose settlement began at the end of the eighteenth century at Piedra Blanca, with its mild climate and numerous streams, includes the chapel of Nuestra Señora del Rosario ("Our Lady of the Rosary"), a national monument and one of the oldest buildings in the country. La Villa Veraniega ("the summertime town") possesses an important infrastructure to support tourism. Tourists have a few hotels in Merlo to choose from.