Casa Bosforo is a concept for a guesthouse in Istanbul. A dome anchors the rooms that face the water, with weathered concrete volumes, arched openings, and planted internal courtyards in lower floors. Communal spaces like a dining area, a lounge floor, and an indoor pool under a curved glass roof sit alongside a handful of private rooms. The architecture is built from raw concrete, polished floors, and steel-framed glazing, with light and greenery doing much of the work.