If you, like me, still harbor some Swiss Family Robinson fantasies, you'll love this. In Turin, Italy, 25 Verde is about as green as they come — both figuratively and literally. It's overflowing with plants, trees, moss walls and a green roof. It's also energy and water efficient, designed to utilize geothermal energy, rainwater and strategic ventilation to reduce power usage. Architect Luciano Pia really thought of everything.