“In between the Mediterranean Sea and the coastal mountain range in northern Spain, Tarragona-based architect Guillem Carrera has completed Casa VN, an energy-efficient luxury home that pays homage to the region’s historic heritage. Set on a steep slope, the modern home uses terraces to step down the landscape and is faced with walls of glass to take advantage of panoramic views. To reduce energy demands, the house follows passive solar principles; it is also topped with insulating green roofs and equipped with home automation technology…”