This 107-meter tall skyscraper is one of the most famous architectural landmarks in Madrid. The continuous façade of reddish glass with round corners and the steel sunshades define the characteristic look of the tower, its ocher color resulting from the oxidation of steel. Due to a subway tunnel that runs underneath the tower, the building structure consists of two concrete cores whose foundations rest on both sides of the tunnel. This central structure supports six concrete floor platforms, which in turn support the five steel structure floors above each of them, divided into different heights. (EP)