This penthouse has a peculiar typology: besides its reduced size of around 70m2 and its location within a fulfilled neighborhood of Madrid it pretends to be a detached house; it is an urban shelter in the center of the city.The project started like a game, how to incorporate 15 desires or fantasies of a couple within a small rooftop. Some of these wishes were a bit uncommon for small urban apartments: simultaneous indoor/outdoor shower, breakfast with views, picnic in the park, golf at home, bathing on the countryside, cooking in the middle of the house, sunset cocktail bar, dining under the stars, exhibitionist theater in the living room, etc.Three curtains made out of artificial materials, in combination with a collection of particular details, provoke a series of unexpected moments within the limited space of the house: a 10-meter white leather curtain organizes the program on the lower level hiding or unveiling the office, the kitchen and the wardrobe; a gold curtain covers the indoor/outdoor shower framing Madrid's skyline; a cantilevered stair gives access to the upper level, through a door installed on the floor and counterbalanced with a hanging stone, where a grass curtain wraps the bedroom floor and the terrace converting the mezzanine into a small park overlooking the city.