The creation of an underground residence presents significant challenges, particularly in preserving the morphological integrity of its surroundings. In the Cyclades, where the landscape is protected for its historical and natural value, this typology has become increasingly common. Living underground offers protection from the intense Aegean sun and strong northern winds, while creating a distinctive spatial experience.

In this architectural synthesis, a stepped sequence of subterranean spaces connected by vertical circulation cores establishes a continuous spatial flow. The residence is embedded within the sloping terrain overlooking Ornos Bay, minimizing its environmental footprint. The visible façades are expressed as horizontal planes aligned with the contour lines, reinforcing the dialogue between architecture and landscape. Openings are primarily concentrated on the only visible main façade, while additional apertures are formed through internal patios that provide natural light and ventilation. In this way, light and air act as filters, mediating between exterior conditions and interior space.

Due to the narrow and steep plot, the volume is organized across three levels. Communal areas occupy the middle level, with bedrooms positioned above and below at equal vertical distances. Independent vertical cores with stairs and an elevator connect all levels. Vehicle access is carefully positioned to minimize terrain intervention, while the upper bedroom level and the observatory–gym are also accessible by car.

The central terrace, the largest outdoor platform, extends the communal spaces and accommodates a swimming pool along with shaded living and dining areas. Tall stone retaining walls create wind-protected outdoor pockets, while smaller sheltered terraces serve the bedrooms.