Casa MR is a concrete holiday retreat designed by local architect Luciano Kruk. The architect built a property of two halves to retain the natural slope of the site, and used the peak of the sand dune to support one end of the upper storey. Casa MR is a concrete holiday retreat located in a vegetated and sandy plot on the Costa Esmeralda, outside the city of Buenos Aires in Argentina. The imposing holiday retreat is clad in wood and concrete and features two intersecting blocks: “Seeking to not change in the least the original topography, we decided to split the program into two simple volumes,” said Kruk. “The proposal seeks to preserve the most of the wonderful qualities of the place.” The construction rests on the noble qualities of concrete, in contrast to the expression of the quebracho wood, dark aluminum and glass. The upper volume is supported by a sand dune and leans on the middle of the perpendicular block below. Large panels of sliding glass bracket the two bedrooms in the upper volume. They connect to a rooftop terrace on one side, and an external corridor that runs along the other.