The new Plaza features the first terraced lawn in the United States and one of the largest indoor green walls in North America. A unique feature of the Plaza is a new concept of domed, naturally lit lavatory cabinets hidden within the landform. The innovative design of the underground restrooms will take advantage of earth insulation, an age-old concept that is highly energy efficient and joins other existing environmental practices at Longwood. A curving glass roofed corridor spine running between the two rows of lavatory domes is surrounded by massive “living” or green wall. The mechanical and electrical systems are closely integrated in with the architecture to ensure that the systems are not intrusive to the vision for the project. Unique features include a zoned radiant floor heating system, ice melting system and watering system for the green wall.