Architect's underground housing-studio located in Madrid is today a Foundation Fernando Higueras. The single space is 8 meters high, without partitions or windows, bounded by 4 concrete walls that join the 2 floors, illuminated by the 4 skylights of the large patio and the 5th of the small landing on the stairs. It enjoys a splendid natural overhead light and an ideal temperature almost constant between 20o and 25o. On the deck, 2 meters of land, plus five double skylights (of 2 x 2 x 5 = 20 m2), isolate of annoying temperatures, saving 65% of unnecessary energy.
Rascainfiernos was housing for over 30 years. It lacks windows that are not missing because in return there is a large area of walls, without partitions, but with good natural light. Higueras said "This idea saved my life thirty years ago, when my friend Francisco Nieva, reading the tarot, saw me before 3 years underground, with a cypress on top, when I left 4 times in a row death. I insisted that I did not mean to say that I was going to die. Then I came up with this first map of the world (I then projected it to Zero Zone of New York), I planted a cypress, today 18 meters, and here I am: I live."