Varela House Curiosity · Collado Mediano, Cuenca del Guadarrama, Madrid Image of Collado Mediano, not of the place itself. A house of 115 square metres that Alejandro de la Sota built between 1964 and 1968 on a commission from José Varela as a prototype of prefabricated panels of prestressed, washed concrete; it is the only work from that experimental series ever built. Photo: www.webcamsantander.… (CC BY 3.0) What to see and do in Collado Mediano