The Castle of San Martin, located in Soto del Barco, Asturias, is located at the mouth of the Nalón River. It is considered that Alfonso III promoted the construction of this fortress on the remains of a previous settlement. During the Middle Ages, it played a crucial role in several nobiliary conflicts and was restored in the nineties.This castle enjoys a privileged position, being only 7 kilometers from Asturias airport and has excellent transport connections.The property The Castle covers 43,485 m², completely enclosed by a high wall with battlements. At its peak stands an impressive tower or square tower of 120 m², accompanied by a contemporary construction of 1,220 m² that is attached to the wall and stands out externally in the form of a balcony adjacent to the tower.The new building is a modern two-story pavilion of 767 m², built with materials that harmonize with the surroundings. The main house extends linearly on a single floor, with exceptions such as the pool, the kitchen, and the service quarters, located on a lower level. On the main floor are the spacious living room and dining room and three wonderful suites with bathrooms. On the lower level, in addition to the kitchen, there is an indoor pool and the service area.The tower is a medieval stone structure that has been internally modernized to allow efficient use of space without compromising the original materials, including an elevator and stairs to access each level. A glass-enclosed lookout offers spectacular views of the surrounding natural area.In the lower area of the estate is La Casona, a three-story, 767 m² built house. This house, of notable architectural interest and recently renovated, is ready to move in. Built at the beginning of the 20th century, it reflects the Asturian vernacular style and features skylights and exterior galleries that function as loggias. Accessing through the middle level, there is a central corridor that crosses the building and leads to a corridor sheltered by a glass gallery. It has four main bedrooms, a living room, three bathrooms, another living room and dining room on the ground floor, and two additional bedrooms in the attic.The garden emulates Italian landscaping designs with delimited terraces, with fruit trees and shrubs predominating, including century-old specimens.To the south of the property, facing the main entrance, there is another 530 m² house, structured on three floors and divided into four fully furnished and decorated apartments, each with its own garage and storage areas.