Mar Azul is a place well-known for us since time ago, so when in 2004 we built our first work, we knew that we have to join in a land that despite of its worthy landscape, it has never count with a legal support that protect this patrimony of those which built with a unique aim: get the most out of the earth. This land neither count with a code that, understanding the logic of this privileged space, regulate resolving the difference between this inappropriate constructions and the possibility of building without losing the properties of the site. In addition to this situation, the habit of building “picturesque houses in a place of fantasy” is taming slowly the forest, which is nowadays owner of a strong wild presence. Operate in this site meant to know the maladjustments and see how the Architects can make an alternative contribution. The answer was the proposal of architecture of minimums resources in the materials and in the form, not only as an aesthetic solution but as an ethical principle of recovery the rational use of the different available resources. This architecture must be incorporated to the landscape, looking to be part of the reality that already exists. To make it possible, is necessary to know “how to listen” what the sites tell us, so the firsts approaches must been free of old prejudices to can capture not only the tangible data but the atmospheres that the place gives us, those which we can only perceives if our looks are free of preconceptions. This meant we have to practice the exercise of “watching for the first time”. Consider the data, let the place invade us and imagine how the own project capitalizes them, this is critical to ensure that architecture and landscape are based.We have already practice this exercise, going to Mar Azul in many opportunities, so we worth the strong presence of the landscape and we have known the microclimate the forest provides: the attenuation of the strong sea winds, the constant shadow of the trees protecting from the hot weather in the summer, but at the same time, producing a humid environment in the winter, and the fact that under the pines is smaller the amount of light during the whole year. We also knew that the forest does not require maintenance apart from removing the dry vegetation, unless other specie is introduced and broke the actual harmony. Recognize this particularly microclimate was determinant to make choices in the aesthetic and constructive system of the house. It was necessary to gain light so it allows us to consider the entirely work as a “semi covered”, resolving it by using big glasses which provides, from the inside, greats views to the sea and to the landscape; an from the outside, reflects the nature making the work camouflages with it. The necessities of build the work as fast as possible and have no maintenance make us choice the reinforced concrete as the constructive solution. The shadow allows us to use this material because it provides thermal protection from the spring to the autumn and its conditioning in the winter was not relevant because it is a Summer House. The waterproof insulation was resolved by a high compactness concrete and studying the outer skin to make faster the water drainage. The expressiveness qualities of the reinforced concrete and its properties of resistance and impermeability, make it unnecessary to use a surface finish, gaining a low budget in its execution without a future maintenance. On the other hand, the color and texture of the concrete made by formwork of wood tables provides a strong and mimetic presence at the same time, allowing the work be in harmony with the landscape. In brief, an outer skin made by two materials: glass and concrete, resolve the integration with the landscape and gives us an answer to the Functional, Formal and Structural issues of the surface finish and maintenance. With the same canon, the resolution of the outdoors activities was the result of making the minimum intervention in the environment. We avoid any kind of landscaping, not only because of the convenience of doesn’t have to maintain it but us avoid the unnecessary bounds in a place without a lot of constructions yet. We like this strong homogeneity in the forest, made by coniferous, acacias, and some high grassland that are the dominant vegetation in the dunes zone near the sea.