Years later, in this place, a large hacienda was established that became part of the mayorazgo (entailed estate) of La Laja in the 18th century. This construction was known as the Hacienda de San Agustín Buenavista, of which there are currently some remnants of the buildings that comprised it, revealing the importance of these types of constructions during the colonial period.

In the Hacienda de San Agustín de Buenavista, the chapel stands out. It features a sober facade made of pink quarry stone, with access to the interior through a semicircular arch. Above this arch is a smooth frieze supported by a base that holds the window of the second level. Additionally, it bears an inscription marking its year of construction: 1772.

At the top of the window is a pedestal that supports a beautiful embellishment, featuring a mixtilinear frame and a coat of arms with four fields belonging to the entailment. The facade is complemented by a small two-level tower. In addition to the chapel, remnants of watchtowers survive, which were used to constantly monitor the roads and surroundings, possibly built in the 19th century. There are also remains of constructions that served as granaries, corrals, and likely inns supported by strong, thick buttresses. Additionally, traces of the cobblestone paths that passed alongside can be found. Today, Buenavista is a predominantly livestock and agricultural community that formed around the hacienda.